Arachnology
Entomology
Invertebrate Zoology
Vertebrate Zoology
Word Roots
Strange Tales
Rokes and Jiddles
A Dictionary for Invertebrate Zoology
Head Words - P
P1, Pacemaker, Pachydermatous, Pachydont (Pachyodont), Pachynema, Pachynesis, Pachynomidae, Pachytene, Pachytroctidae, Pad, Paddle Worms, Paedium, Paedogenesis (Pedogenesis, Pro-Thetely), Paedomesoblast, Paedomorphosis, Paedoparthenogenesis, Paedophagous, Pagina, Pagiopodous, Paguridae, Paguroidea, Paired Organelles, Paired, Pala, Palaeacanthocephala, Palaearctic Faunal Region, Palaemonidae, Palaeoarctic, Palaeobiology, Palaeocene, Palaeoconcha, Palaeodictyoptera, Palaeo-Ecology, Palaeogaea (Palaeogea, Megagaea), Palaeogenesis, Palaeogenetic (Recapitulatory), Palaeogenetics, Palaeoheterodonta, Palaeolaurentian, Palaeolepidoptera, Palaeomontane, Palaeonemertea (Palaeonemertini, Palaeonemertines), Palaeontology, Palaeopantopoda, Palaeoptera, Palaeosetidae, Palaeospecies, Palaeostraca, Palaeotaxodonta, Palaeotropical, Palaeoxeric, Palaeo-Xeromontane, Palaeozoic (Paleozoic), Palaeozoology, Palatal, Palatal Setae, Palate, Palatum, Palea, Paleae, Palearctic, Paleocene (Palaeocene), Paleogene (Palaeogene), Paleonemertea, Paleospecies, Paleotropical, Paleozoic, Palette, Pali, Palus, Palidium, Paliform, Paliform Lobe, Palinal, Palingenesis, Palingenetic, Palingeniidae, Palintrope, Palinura (Palinuridea), Palinuridae, Palisade, Pallaesthseia, Pallet, Pallette, Pallial, Pallial Artery, Pallial Cavity, Pallial Chamber or Cavity, Pallial Complex, Pallial Curtain, Pallial Duct, Pallial Gills, Pallial Groove, Pallial Line, Pallial Markings, Pallial Nerves, Pallial Region, Pallial Retractor Muscles, Pallial Sinus, Palliate, Palliobranchial Fusion, Palliolum, Palliopedal, Pallioperitoneal, Palliovisceral Nerve Cords, Pallium, Pallopteridae, Palmaria (Tertibrach), Palmate, Palmén’s Organ, Palmula, Palp (Palpus), Palpata, Palpation, Palp Foramen, Palp Proboscis, Proboscide, Palpacle, Palpate, Palpatores, Palpebral, Palpi, Palpifer (Palpiger), Palpiform, Palpiger, Palpigradi (Palpigrada), Palpimacula, Palpocil, Palpon, Palpulus, Palpus, Palp, Palpi, Paludicellea, Paludicole (Palustral), Palule, Palus, Palustral, Pamphiliidae, Pampiniform, Panbiogeography, Pancarida, Pandemic, Panduriform (Pandurate), Panendemic Distribution, Paneth Cells, Pangaea, Pangamic, Pangamy, Pangenesis, Panmictic, Panmixia, Panniculus, Pannose, Panoistic Ovarioles, Panorpatae, Panorpidae, Panphenetic, Panphytophagous, Panspermia, Panthalassa, Panthalassic, Pantherine, Pantonematic, Pantophagous, Pantopoda, Pantostomatic, Pantropic (Polytropic), Pantropical, Panzootic, Paper Wasps, Papilioform, Papilionidae, Papilionoidea, Papilla Genitalis, Papilla, Papillae Anales, Papillary, Papillary Sac, Papillate (Papillose), Papilliform, Pappiferous, Pappus, Papuan, Papula (Skin Gill), Papulous, Para-Aortic, Parabasalia, Parabiosis, Parabiotic, Parablast, Parablastoidea, Parabranchia, Parabranchial Groove, Paracardo, Paracentral, Paracentric (Homobrachial), Paracentric Inversion, Paracercopidae, Parachoric, Parachromatin, Parachrosis, Paraclypeus, Paracme, Paracopulatory Organ, Paracrinoidea, Paracymbium, Paracyte, Paracytoids, Parademe, Paradermal, Paradesmus, Paraedeotype, Paraerucism, Parafacialia, Paraflagellum, Parafrons, Parafrontals, Paragaster (Spongocoel), Paragastric, Paragastrula, Parageneon, Paragenesis, Paragenetic, Paraglossa, Paragnatha, Paragula, Parahemizonid, Paralabial Areas, Paralimnic, Paralimnion, Parallel Evolution, Parallel Mandibles, Parallel Polymorphism, Paralogy, Paramelitidae, Paramentum, Paramere, Parameral Lobes, Paramorph, Paramphistomatidae, Paramutualism, Paranal, Paranal Lobes, Paranemic, Paraneoptera, Paraneural Muscle, Paraneuroptera, Paranota, Paranuclear Body, Paranuclear Mass, Paranucleus (Nebenkern), Para-Oesophageal Connectives (Circum-Oesophageal Commissures), Para-Oesophageal, Parapatric Speciation, Parapatric, Parapet, Parapharynx, Paraphrynoveliidae, Paraphyletic, Paraphysis, Paraplasm, Parapleurolophocercous Cercaria, Parapleuron, Paraplicate Folding, Parapodia, Parapolar, Parapolar Cells, Parapostgenal, Paraprocts, Parapsidal, Parapsidal Furrow, Grooves, Parapsidal Suture, Parapsides (Parapsis), Paraptera, Parapteron, Parapyles, Pararectal, Pararotoria (Seisonidea), Parasagittal, Parasagittal Section (Plane), Parascolus, Parascutal Area, Paraselloidea, Parasematic, Paraseme, Paraseptal, Parasexual, Parasigmoidal, Parasita, Parasite Chain, Parasite, Parasitic Barnacles, Parasitic Castration, Parasitic Flies, Parasitic Male, Parasitic Wasps, Parasitic Woodwasps, Parasitica (Terebrantia), Parasiticide, Parasiticidal, Parasitiformes, Parasitism, Parasitization, Parasitocoenosis, Parasitoid, Parasitology, Parasitophorous Vacuolar Membrane, Parasocial (Presocial), Parasocial Nesting, Parasol Ants, Parasporal, Parasternalia, Parastipes, Parasulcate Folding, Parasymbiosis, Parasympathetic Nervous System, Parasynapsis, Parataxon, Parately, Paratenic Host, Paratergite, Parathyridium, Paratomy, Paratonic, Paratope, Paratroch, Paratrophic, Parauterine Organ, Paraxial, Paraxial Organs, Paraxon, Paraxonic, Parazoa, Parazoeal, Parazoon, Parcidentate, Pardaliscidae, Parecium, Parenchyma, Parenchymalia, Parenchymula, Parenchymella, Parental Care, Parental Generation, Parental Investment, Parhomology, Paria, Parae, Paries, Parietes, Parietal, Parietal Callus, Parietal Cells, Parietal Fold, Parietal Lip, Parietal Muscles, Parietal Pore, Parietal Region, Parietal Ridge, Parietal Septum, Parietal Tube, Parietal Wall, Parietes, Parietobasilar Muscles, Parietovaginal, Parity, Parivincular, Parocciput, Parolfactory, Paronychium, Paronychia (Whitlow), Pars, Pars Ampullaris, Pars Basalis, Pars Bothrialis, Pars Bulbosa, Pars Incisiva, Pars Intercerebralis, Pars Molaris, Pars Postbulbosa, Pars Prostatica, Pars Stipitalis Labii, Pars Stridulans, Pars Vaginalis, Parthenapogamy (Ooapogamy, Obligate Apogamy), Parthenita, Parthenogamete, Parthenogamy, Parthenogenesis, Parthenogenetic, Parthenogone, Parthenokaryogamy (Partheno-Caryogamy), Parthenomixis (Parthenogamy), Parthenosperm, Parthenospore, Parthenote, Partial, Partial Coverage, Partial Dominance, Partial Migrant, Partial Parasite (Semi-Parasite), Particulate Inheritance, Partite, Parturition, Paruterine Organ, Parva Stage, Parvicellular, Parviconoid, Passalidae, Passandridae, Pastinum, Patabionts, Patagial/Patagiate, Patagium, Patella, Patella, Patellacea (Docoglossa), Patellaroid (Patelliform), Patent, Pateriform, Paternal Sex Determination, Pathogen, Pathogenesis, Pathogenic (Nosogenic), Pathognomonic, Pathology (Nosology), Patina, Patobionts, Patocoles, Patoxenes, Patriclinous (Patriclinal, Patroclinous), Patrilineal, Patristic Character, Patristic Distance, Patroclinous, Patrogenesis, Patrogynopaedium, Patronymic, Patulous, Paturon, Paucispiral (Oligogyral), Paulospore, Paunch, Paurometabola, Paurometabolism (Ametabolism), Paurometabolous, Pauropoda, Paurostyle, Pavan's Gland, Pavement, Pawlowsky's (Pavlovskij) Glands, Paxilla, Paxillosida, Pea Crabs, Pea Weevil, Peacock Worms, Peanut Worms, Pearl, Pearman's Organ, Pebrine, Peck Order (Pecking Order), Peckhammian Mimicry, Pecten, Pectina, Pectinae, Pectinariidae (Amphictenidae), Pectinate Chaeta, Pectinate, Pectinations, Pectines, Pectinibranch, Pectinibranchiata (Pectinibran-Chia), Pectinidae, Pectinifera, Pectocaulus, Pectunculate, Pectunculoid, Pectus, Pedal (Podal), Pedal Disc, Pedal Elevator Muscle, Pedal Gape, Pedal Glands, Pedal Groove, Pedal Laceration, Pedal Levator Muscle, Pedal Lobe, Pedal Pit, Pedal Protractor Muscle, Pedal Retractor (Levator) Muscle, Pedal Stridulating Organ, Pedal Waves, Pedalium, Pedamina, Pedate, Peddler, Pedicel, Pedicellariae, Pedicellate, Pedicellinidae, Pedicellus Spines, Pedicle, Pedicle Collar, Pedicle Foramen, Pedicle Groove, Pedicle Muscles, Pedicle Plate, Pedicle Sheath, Pedicle Tube, Pedicle Valve, Pediculidae, Pediferous, Pedigerous, Pedigree, Pedilidae, Pedinoida, Pedipalpi, Pedipalps, Pedipalpus, Pedisulcus, Pedium, Pedia, Pedofossae, Pedogamy, Pedogenesis, Pedonic, Pedothecae, Peduncle, Pedunculate, Pedunculate Bodies, Pedunculate Papillae, Peg Organ, Pegmatypic, Pelagic, Pelagosphaera, Pelagothurida, Pelasgic, Pelecinidae, Pelecypoda, Pellions, Pellucid, Pelma, Pelmatozoa, Peloderan, Pelogonidae, Pelopsiform, Peloridiidae, Pelta, Peltate Tentacles, Peltate, Peltidium, Peltogonopod, Pemphigidae, Pemphredonidae, Pen, Pen Shells, Penaeidea, Pencil, Pendent, Pendulous, Penellipse, Penetrance, Penetrant, Penetration Glands, Penetration Path, Penial Setae, Penicilla, Penicillata (Pselaphognatha), Penicilliform, Penicillus, Penicillum, Peniferum, Penis (Phallus), Penis Funnel, Penis Valves, Pennaceous, Penniform, Pennatulacea, Pennsylvanian, Pentacrinoid Larva, Pentactinal, Pentacula, Pentactula Larva, Pentafid, Pentaglossate, Pentagonal (Pentangular), Pentameral Symmetry, Pentamerida, Pentamerous, Pentamerous Radial Symmetry, Pentaploid, Pentaradiate, Pentasternum, Pentastichous, Pentastomida (Linguatulida, Ton-Gue Worms), Pentatomidae, Pentatomoidea, Pentatomorpha, Pentazonia (Opisthandria), Pentazonian Segment, Penultimate, Peptic Cells (Principle Cells), Peptonephridia, Peracarida, Peraeon (Pereon, Pereion), Peraeonite (Pereonite, Pereionite), Peraeopod, Pereiopods (Pereopods), Peramorphosis, Percurrent, Percutaneous, Perdominant, Pereion (Pereon), Pereionite, Pereiopod, Perennation, Pereon, Pereonite, Pereopod, Perfect Mesentaries, Perfoliate, Perforate, Pergameneous, Pergidae, Perianal, Periaxial, Periblast, Peribranchial, Peribuccal, Peribulbar, Pericardial (Pericardiac), Pericardial Cavity, Pericardial Cells, Pericardial Gland, Pericardial Sinus, Pericardial Sacs, Pericardium, Pericardial, Pericaryon, Perichaetal Condition, Perichae-Tine, Pericellular, Pericentral, Pericentric (Heterobrachial), Pericentric Inversion, Perichaetine, Perichrome, Pericyte (Pericapillary Cell, Rouget Cell), Perideltidium Perideltidial, Periderm, Peridental, Periderm, Peridesmium, Perididymis, Peridural, Perienteric, Perienteric Plexus, Perienteron, Periflagellar Membrane, Perigastric, Perigastrium, Perigastrula, Perigemmal, Perignathic Girdle, Perigonadial, Perifibrillar, Perihaemal (Perihemal), Perikaryon (Pericaryon), Perilampidae, Perilemma, Perilemmae, Perilymph, Perimetrical Attachment Organ, Perinaeum, Perinductura, Perineum (Perinaeum), Perineural, Perineurium, Perineuronal, Perinotum, Periocular, Period, Periodicity, Periodomorphosis, Periopticon, Peri-Oral, Periostracal Groove, Periostracum, Peripatidae, Peripatopsidae, Peripatus, Periphallic Organs, Peripharyngeal Ganglion, Peripheral, Peripheral Isolate, Peripheral Nerve Net, Peripheral Nervous System, Periphyton (Aufwuchs), Periplasm, Peripneustic, Peripoda, Peripodial, Peripodial Cavities, Peripodial Membrane, Peripodial Sac, Periproct, Peripylaea (Spumellaria), Peripyle, Perisarc, Periscelidae, Perischoechinoidea, Periscleral, Perisomatic Plates, Perisome, Perispicular Spongin, Perispiracular (Peristigmatic), Peristalsis, Peristasis (Peristatic), Peristethium, Peristigmatic, Peristigmatic Glands, Peristome, Peristomium, Perisympathetic System, Peritoneal Membrane, Peritoneal Sheath, Peritoneum, Peritreme (Peritrema), Peritrichous, Peritrochium, Peritrophic Membrane, Perivascular, Perivisceral Coelom, Perivisceral, Perivitelline Membrane, Periwinkles, Perlaria, Perlidae, Permanent Haplometrosis, Permanent Parasite, Permanent Pleometrosis, Permeability, Permeants, Permesothyridid Foramen, Permian, Peromedusae, Peronate, Peroneal, Peronium, Perophoridae, Peropod, Peroral, Perothopidae, Perradial, Perradius, Perseveration, Persistence, Persistent, Person, Pervalvar, Perversum Confusa, Perversum Simplex, Pervious, Pes, Pest, Petal, Petaloid Ambulacra, Petaloid, Petaluridae, Petasma, Petiolar, Petiolate, Petiole (Podeon), Petraliiform Colony, Petricolous, Petriidae, Petrobionidae, Petrocolous, Petrophilous, Petrosina, Phacella, Phacoid, Phaeism, Phaeno-, Phaeochrous, Phaeodaria (Tripylaea), Phaeodium, Phaeomelanin, Phagocytes, Phagocytosis (Phagocytic), Phagolysis, Phagolysosome, Phagosome, Phagotrophs, Phagozoite, Phalacridae, Phalaenoididea, Phalanges, Phalangida, Phalanx, Phallic Gland, Phallic Lobes, Phallic Organ (Penis), Phallobase, Phallocrypt, Phallomeres (Phallic Lobes), Phallosome, Phallotheca, Phallothecae, Phallotreme, Phallotrema, Phallus, Phaloniidae (Conchylidae), Phanere, Phaneric, Phanerocephalic Pupa, Phanerocodonic, Phanerogenic, Phanerognatha, Phaneromphalous, Phanerotaxy, Phanerotactic, Phanerotoxic, Phanerozoa, Phanerozoic, Phanerozonia (Phanerozona), Phantom Larva, Phaoplankton, Phaosome, Pharaoh’s Ant, Pharate, Pharetronida, Pharotaxis, Pharyngeal Canal, Pharyngeal Ganglion, Pharyngeal Glands, Pharyngeal Skeleton, Pharyngeal Tube, Pharyngeate, Non-Ocellate Cercariae, Pharyngeal, Pharyngobdellae (Pharyngo-Bdellida), Pharyngobranchial, Pharyngo-Intestinal Valve, Pharynx of Leisblein, Pharynx, Pharynges, Pharynxes, Pharynx, Phascolosomatidae, Phascolosomatidea, Phascolosomatiformes, Phase Gregaria, Phase Solitaria, Phase Type, Phasic, Phasic Castration, Phasic Motor Neuron, Phasic Muscles, Phasma, Phasmata, Phasmatidae (Phasmidae), Phasmid, Phasmida (Phasmatoidea), Phasmidia, Phasmodidae, Phenacoleachiidae, Phene, Phenetic Classification, Phenetic, Phengodidae, Phengophil, Phengophobe, Phenocontour, Phenocopy, Phenocritic, Phenocritical Period, Phenodeme, Phenodeviant, Phenogenesis, Phenogroup, Phenological Species, Phenology, Phenom(e), Phenon, Phenotype, Phenotypic Adaptation, Phenotypic Neutrality, Phenotypic Plasticity, Phenotypic Polymorphism, Phenotypic Sex Determination, Phenotypic Variance, Phenotypic, Pheromone (Ectohormone, Socio-Hormone), Phialiform, Phialaeform, Philanisidae, Philanthidae, Philinoglossacea, Philopatry, Philopotamidae, Philoprogenetive, Philopteridae, Philorheithridae, Philothermic, Philtrum, Phlaeothripidae, Phleboedesis, Phlebedesis, Phloeodic, Phloeomyzidae, Phloeothripidae (Phlaeothripidae), Phloiophilidae, Phoba, Phobae, Phobotaxis, Phoenicoccidae, Pholadina, Pholadomyoida, Pholcidae, Pholidosis (Squamation), Phonation, Phonoreceptor, Phoresis, Phoresy, Phoresia, Phoretic Copulation, Phoretic Host, Phoretomorph, Phoridae, Phoronida (Phoronidea), Phoront, Phorozoon, Phosphorescence, Phosphovitin, Photic Zone, Photoautotroph, Photocytes, Photodinesis, Photogen, Photokinesis, Photolabile, Photoperiod, Photoperiodism, Photophelein, Photophilic, Photophobic, Photophobotaxis (Negative Trop-Ism), Photophore, Photophore, Photopia, Photopigments, Photoreceptor, Photospheres, Phototaxis, Phototelotaxis, Phototonus, Phototropism, Photropic, Phoxocephalidae, Phragma, Phragmocone, Phragmocyttarous, Phragmoplast, Phragmosis, Phragmosome, Phragmospore, Phragmoteuthida, Phratry (Clan), Phreatoicidea, Phronimidae, Phryganeidae, Phryganoidea, Phrynophiurida, Phthinoid, Phthiraptera, Phthiriasis, Phthiridae, Phthisaner, Phthisergate, Phthisodinergate, Phthisogyne, Phycitidae, Phycodromiidae, Phycophagous, Phycophilic, Phyla, Phylacobiosis (Parabiosis), Phylactocarp, Phylactolaemata, Phylacum, Phylembryo, Phylephebic, Phylesis, Phyletic Evolution, Phyletic Extinction, Phyletic Gradualism, Phyletic Lineage, Phyletic Speciation, Phyletic, Phyllidae (Phylliidae), Phyllidium, Phylliform, Phyllobombycin, Phyllobothrioidea, Phyllobranchiate Gill, Phyllocarida, Phyllocyst, Phyllodes, Phyllodocida (Phyllodocemorpha), Phyllodocidae, Phyllodociformia, Phyllolepidi, Phyllophagous, Phyllopoda, Phyllopodium, Phyllosoma, Phyllotriaene, Phylloxeridae, Phyllozooid, Phylobiology, Phylogenetic Chimera, Phylogenetic Classification, Phylogenetic Systematics, Phylogenetic Tree, Phylogeny, Phyloneanic, Phylonepionic, Phylum, Phymatidae (Macrocephalidae), Phymosomatoida, Physa, Physalia Physalis, Physapoda, Physcephalata, Physergate, Physical Gill, Physiogenesis, Physiogenic, Physiognomy, Physiological Ecology, Physiological Race, Physiology, Physogastry, Physophorina, Physosomata, Phytalfauna, Phytalmiidae (Phythalmiidae), Phytobiontic, Phytobiotic, Phytocoenosis, Phytoparasite, Phytophaga, Phytophagous, Phytophilous, Phytophthires, Phytosuccivorous, Phytotelmic, Phytotoxin, Phytotrophic, Piceous, Pick, Pictured, Pieridae, Piesmatidae, Piesmatoidea, Pigment Cell, Pigment, Pigmenta Cercaria, Pigmentation, Pigmy (Pygmy) Male, Pileate, Pilei, Pileus, Pilei, Pilidium Larva, Piliferous, Pilifers, Piliform, Pill Beetle, Pill Bugs, Pill Millipedes, Pillar, Pillared Eye, Pilomotor, Pilose, Pilus, Pinacocyte, Pinacoderm, Pinaculum, Pincate Beetle, Pincers, Pine-Tree Katydids, Pinna, Pinnae, Pinnafid, Pinnate, Pinnidae, Pinniform, Pinnigrade, Pinnotheridae, Pinnulary, Pinnule, Pinocytic Vesicle, Pinocytosis, Pinosome, Pinule, Pinulus, Pinworms, Pioneer Community, Piophilidae, Piping, Piptoblast, Pipunculidae, Piracy, Piriform, Pisauridae, Piscicolidae, Piscicolous, Pisciform, Piscivorous (Ichthyophagous), Pisiform, Pisionidae, Pistillum, Pistol Shrimps, Pit, Pit Chamber, Pit Gland, Pith, Pivotal Axis, Pivotal Bar, Pivot Joint, Placids, Placochromatic, Placode, Placodes, Placoid, Placoid Sensilla, Placophora, Placozoa, Plagiorchiida, Plagiorchiidae, Plagiotriaene, Plagula, Plait, Planarians, Plane of Symmetry, Planetism, Planidium, Planiform, Planipennate, Planipennia, Planispiral, Plankter (Planktont), Planktohyponeuston, Plankton, Planctosphaeroidea, Planktotrophic Larvae, Planktotrophic, Planoblast, Planogamete (Zoogamete), Planont, Planorbidae, Planorboid, Planozygote, Plant Bugs, Plant Hopper, Plant Lice, Planta (Pelma), Plantella, Plantula, Planula, Planum, Plaques, Plasmagene, Plasmagynogamous, Plasmaheterogamous, Plasmaisogamous, Plasmalemma, Plasmalemmosomes, Plasma Membrane (Cell Membrane, Plasmalemma), Plasmatocyte, Plasmocyte, Plasmodesma (Plasmodesmata), Plasmophagous, Plasmophore, Plastidogen Organ, Plastodeme, Plastoecodeme, Plastron Respiration, Plastron, Plataspidae, Plate Organ, Plates, Platyasterida, Platycnemididae, Platycopida, Platyctenea (Platyctenia), Platyform Larva, Platygasteridae, Platyhelminthes (Platyhelminths, Flatworms), Platyischnopidae, Platymyarian, Platypezidae, Platypodinae, Platystictidae, Pleasing Fungus Beetles, Pleated Sheet, Plecoptera (Perlaria), Plectanes, Plectolophe, Plectonemic, Plectonephridia (Plectonephria), Plectoptera, Plectron, Plectrotarsidae, Plectrum (Malleus), Plegma, Plegmata, Plegmatium, Pleidae, Pleiomorphic, Pleiomorphism, Pleiosporous (Polysporous, Poly-Sporic), Pleiotropism (Pleiotropy), Pleioxenous, Pleistocene, Pleistogene, Pleochroic, Pleochromatic, Pleocyemata, Pleomere, Pleometrosis, Pleometrotic, Pleomorphic (Pleiomorphic), Pleomorphism, Pleiomorphism, Pleon (Pleonite), Pleonic Hinges, Pleophagous, Pleophyletic, Pleopod, Pleotelson, Pleotrophic, Plerergates, Plerocercoid, Plerocercoid Stage, Plerocercus, Plerocestoid, Plesioasters, Plesiobiotic, Plesiomorphic (Plesiomorphous), Plesiomorphic Characters, Plesiopora, Plesiotype, Pleura, Pleural, Pleural Angle, Pleural Apophyseal Pit, Pleural Apophysis (Pleural Arm), Pleural Area, Pleural Coxal Process, Pleural Lobe, Pleural Membrane, Pleural Ridge, Pleural Sclerites, Pleural Sulcus, Pleural Suture, Pleural Wing Process, Pleuralia, Pleurella, Pleurembolic Proboscis, Pleurepimere, Pleurergate, Pleurite, Pleurobranch (Pleurobranchia), Pleurobranchiae, Pleurobranchomorpha, Pleuroccipitals, Pleurocerebral, Pleurocoela, Pleurogenous, Pleurolophocercous (Parapleuro-Lophocercous) Cercaria, Pleuron, Pleuropedal, Pleuropodite (Pleuropod), Pleuropodium, Pleurosternal, Pleurosternal Suture, Pleurosternite, Pleurosternum (Coxosternum), Pleurostoma, Pleurostomal Suture, Pleurotergite, Pleurothetic, Pleurotomariacea, Pleurovisceral, Pleuston, Plexiform Gland, Plexiform, Plexus (Rete), Plica, Plica Analis, Plica Jugalis (Axillary Furrow, Plica Anojugalis), Plica Vannalis, Plicate, Plicate Canals, Plication, Pliciform, Pliciloricidae, Pliocene, Ploidy, Ploimida Ploima, Plokiophilidae, Plumaceous (Plumulate), Plumaridae, Plumate, Plumbeous, Plume Moth, Plume, Plumicome, Plumoreticulate Skeleton, Plumose Hair, Plumose Skeleton, Plumule, Plurilocular, Plurinuclear, Pluriparous, Pluripartite, Pluripolar, Pluripotent, Pluriseptate, Pluristratose, Plurivalent, Plurivorous, Plutellidae, Pluteus, Plyopod, Pneumatization, Pneumatized, Pneumatocodon, Pneumatocyst, Pneumatophore, Pneumatopyle, Pneumatosaccus, Pneumoridae, Pneumostome, Pneumotaxis, Pneumotropism, Poculiform, Pod, Podagrionidae, Podal, Podapolipidae, Podapolipodidae, Podeon (Podeum), Podex, Podial Opening/Pore, Podia, Podium, Podical, Podilegous, Podite, Podobranchiae, Podobranch, Podocephalic Glands, Podocopa, Podocyst, Podocyte, Podogonata, Podomere, Podophthalmite, Podosoma, Podospermia, Podotheca, Podous, Poduridae, Poduroidea, Podzol (Podsol), Poecilacanthous Armature, Poecilandric, Poecilandry, Poecilocyttares, Poecilogeny, Poecilogony, Poecilogynic, Poecilosclerida (Poecilosclarina), Pogonophora, Poikilocyte, Poikilodynamic, Poikilohaline, Poikilokont, Poikilosmotic, Poikilotherm (Cold-Blooded, Exotherm, Heterotherm), Point Mutation (Micromutation), Poisers, Poison Beetle, Poison Canal, Poison Claws, Poison Glands, Poison Sac, Poison Seta, Poisson Distribution, Polar (Pole) Capsules, Polar Body, Polar Cap, Polar Corpuscle, Polar Field/Plate, Polar Filament, Polar Granule, Polar Organ, Polar Plates, Polar Ray, Polar Rings, Polar, Polarity, Polarization, Pole Cell, Polian Tubules/Villi, Polian Vesicles, Polian Vessel, Polioplasm, Pollen Basket, Pollen Beetle, Pollen Brush, Pollen Comb, Pollen Pocket, Pollen Pot, Pollen Rake (A Pecten), Pollen Storers, Pollenophagous, Pollex, Pollinators, Polliniferous (Pollinigerous), Pollinose, Polyact, Polyadenous Cercaria, Polyalleles, Polyandric, Polyandry, Polyanisomere, Polyarthric, Polyaxon (Multiradiate Spicule), Polybasic, Polybrachiidae, Polycentric, Polycentromic, Polycentropodidae, Polycercous (Polycercoid), Polychaeta, Polychelidae, Polychromatic, Polychromatocyte, Polychromatophil, Polychronic Species, Polycladida, Polyctenidae, Polycyclic Parthenogenesis, Polycystina, Polydelphic, Polydemic, Polydesmida (Polydesmoidea), Polydisc Strobilation, Polydiverticulate, Polydomic (Polydomous), Polyembryony, Polyenergid, Polyergistic, Polyethism, Polyfactorial, Polygamy, Polygenes, Polygenesis, Polygenic Character, Polygenic, Polygenomatic, Polygerm, Polygigeriate, Polygonadal, Polygoneutic, Polygynopaedium, Polygyny, Polygyral, Polyhaline, Polyhaploid, Polyhedrosis, Polyhybrid, Polyisomeres, Polykaric, Polykaryon, Polykont, Polylecithal, Polylectic, Polylepidous, Polyloculate, Polymastigote, Polymegaly, Polymeniscous, Polymerous, Polymitarcidae, Polymitosis, Polymorph, Polymorphida, Polymorphism, Polymorphous (Polymorphic, Pleomorphic, Pleiomorphic), Polymyarian, Polyneme, Polynemic, Polynesian Subregion, Polynoidae, Polynucleate, Polyopisthocotylea (Polypistho-Cotylea), Polyp, Polypalmate, Polyparium, Polypary, Polypares, Polyphaga, Polyphagidae, Polyphagous, Polyphagy, Polyphasic, Polyphenism, Polyphyletic (Polyphyly), Polypide (Polypite), Polypidian Bud, Polypidian Vesicle, Polypidom, Polypisthocotylea, Polyplacophora, Polyplanetic, Polyplastic, Polyplocidae, Polyploidy, Polypneustic, Polypneustic Lobes, Polypod (Polypodous), Polypoid, Polyprostatic, Polypsocidae, Polysaprobic, Polysiphonic, Polysiphonous, Polysomatic, Polysomic Genome (Polysomy), Polysomitic, Polyspermy, Polysporocystid, Polysporous (Pleiosporous, Polysporic), Polystachyous, Polystichous, Polystylifera, Polystoechotidae, Polystomatoidea, Polystomatous, Polystomium, Polysymmetrical, Polysynaptic, Polytene Chromosomes, Polyteny, Polytesticulate, Polythalamina, Polythalamous, Polythalamous Gall, Polythecal, Polythelia, Polythermic, Polythoridae, Polytocous (Polytokous), Polytopic (Sub)Species, Polytopic Evolution, Polytopism, Polytrichous, Polytrochal (Polytrochous), Polytrophic, Polytrophic Meroistic Ovary, Polytrophic Ovariole, Polytropic, Polytypic (Polytypism), Polytypic, Polyvoltine, Polyxenic, Polyxenida, Polyxenous, Polyzoa, Polyzoarium, Polyzoic, Polyzoniidae, Polyzooid, Pomatiasidae, Pompetta, Pompilidae (Psammocharidae), Pompiloidea, Pond Skater, Ponderal, Ponerinae, Ponogen, Pons, Pons Cerebralis, Pontine, Pontogeneiidae, Pontoporeiidae, Pool Feeder, Population, Population Biology, Population Bottleneck, Population Cycle (Population Pulse), Population Density, Population Dynamics, Population Ecology, Population Explosion (Eruption), Population Genetics, Population Index, Porate, Porcate, Porcelain Crabs, Porcellanidae, Porcellanous, Porcellaneous, Por-Celaneous, Porcellionidae, Pore, Pore Canals, Pore Cell, Pore Chambers, Pore Diaphragm, Pore Membrane, Pore Plate (of Radiolaians), Pore-Rhombs, Porifera (Parazoa), Poriferous, Poriform, Porocalyx, Porocephalida, Porocyte, Poroid (Poriform), Poromyacea, Porophore, Porose, Porose Area, Porphyrophore, Porrect, Porta, Portal Heart, Portuguese Man-of-War, Portunidae, Positional Alleles, Positional Effect, Positive Assortive Mating, Positive Geotropism, Positive Taxis (Positive Tropism), Postabdomen, Postacrostichal Bristles, Postalar, Postalar (Postalare) Arm/Bridge, Postalar Bristles, Postalar Callus, Postalar Declivity, Postalar Tail, Postalar Wall, Postalar Declivity, Postanal, Postanal Plate, Postantennal, Postantennal Organ (Organ of Tömösvary), Postapical, Postaxial, Postbasal, Postbacillary, Postbascillary Eyes, Postcentral, Postcerebral, Postclitellian, Postclypeus, Postcolon, Postcornu, Postcorpus, Postcoxal Bridge, Postdisplacement, Postecdysis, Postembryonic, Postepipleurite, Posteriad, Posterior, Posterior Apophysis (Apophyses Posteriores), Posterior Area, Posterior Bulb, Posterior Callosity, Posterior Cardiac Lobe, Posterior Carina, Posterior Cell, Posterior Cephalic Foramen, Posterior Cribellum, Posterior Cross Vein, Posterior Flange, Posterior Gastric Pit, Posterior Lateral Tooth, Posterior Notch, Posterior Orbit, Posterior Respiratory Process, Posterior Ridge, Posterior Sinus, Posterior Slope, Posterior Spiracle, Posterior Spiracular Plate, Posterior Stigmatal Tubercle, Posterior Tentorial Arms, Posterior Tooth, Posterobiprostatic, Posterodorsal Margin, Posterolateral, Posteromedial, Postesophageal (Tritocerebral) Commissure, Postesophageal Loop, Post-Fibers, Postfrenum, Postfroenum, Postfrons, Postfrontal Ridge, Postfrontal Suture, Postfurca, Postganglionic, Postgena, Postgenital, Post Glacial Age, Postheterokinesis, Posthumeral Bristle, Posticum, Postlabium, Postlabrum, Postlarva, Postmandibular Area, Postmarginal Vein, Postmating Isolation, Postmentum, Postminimus, Postmitotic Cell, Postnodal Cross Veins, Postnotal Plate, Postnotum, Postoccipital Ridge, Postoccipital Suture, Postocciput, Postocellar Area, Postocellar Bristles, Postocellar Glands, Postocular, Postoral, Postorbital Bristles, Postpalmars, Postpectus, Postpedes, Postpedicel, Postpeltidium, Postpetiole, Postphragma, Postpudendum, Post-Pygidial Gland, Postscutellum (Postnotum, Pseudonotum), Postsegmental, Poststernellum, Poststernite, Poststigmatal Primary Tubercle, Postsynaptic, Posttriangular Cells, Postuterine Sac, Post Vertical Bristles, Postvulvar Uterine Branch, Postzygotic Isolating Mechanism, Potamanthidae, Potamidae, Potamoplankton, Potter Wasps, Pouch, Pouch-Makers, Powder-Post Beetle, Praeabdomen (Mesosoma), Praecostal, Praecoxa, Praecrural, Praecuneus, Praemorse (Premorse), Praeoral, Praesoma, Praniza, Prasinous, Pratincolous, Prawns, Praying Mantis, Pre-Abdomen, Pre-Adaptation, Prealar Arm, Prealar Callus, Preanal, Preanal Region, Preanal Ring, Preantennae, Preapical, Preapical Bristle, Preapical Gland, Preaxial, Preaxillary Excision, Prebacillary, Prebasilare, Prebiotic, Precambrian, Precapillary, Precardo, Precentral, Prechelicerae, Precheliceral, Precibarium, Precious Coral, Precocious Stages, Preconnubia, Precornua, Precosta, Precoxa, Precoxal Bridge (Precoxale), Predaceous, Predacious, Predation Analysis, Predation Pressure, Predation, Predator, Predator Chain, Predisplacement, Pre-Epipodite (Pre-Epipod), Pre-Episternum, Pre-Epistome, Prefemur, Pre-Fibers, Preformation, Prefrons, Pregenital, Pregula, Prehaltere, Prehensile Spines, Prehensile, Preheterokinesis, Pre-Imaginal Conditioning, Pre-Imaginal (Preimago), Pre-Ischiopodite, Preischium, Prelarva, Prelateral Lobe, Premandibular Suture, Premating Isolation, Premedian, Premental Gutter (Labial Gutter, Labial Lumen), Premental Setae, Prementum, Premetaphase, Premorse, Premyoblast, Prenymph, Preocellar Band, Preocular, Preoncosphere, Preoral (Praeoral), Preoral Cavity, Preoral Segment, Preoral Sting, Prepatent Period, Prepectal Carina, Prepectus, Prepharynx, Prephragma, Prepotency, Prepotent, Prepuberal, Prepuce, Prepupa (Propupa), Preputial Sac, Preputial, Preputium, Prepygidium, Prepygidial, Prepyloric Ossicle, Prerectum, Presaepium, Prescutal Ridge, Prescutal Sulcus, Prescutellar Area, Prescutellar Seta/Bristles, Prescutellum, Prescutum, Presegmental, Presentation Time, Presocial, Presoma, Prespermatid, Presternal, Presternum, Prestomal Teeth, Prestomum (Prestomium), Presumptive, Presutural Bristles, Presynaptic, Pretarsus (Praetarsus), Pretrochantin, Preungual Process, Preupsilon, Prevernal, Prevulvar Setae, Prey, Prezoea, Prezygotic Isolating Mechanism, Priapulida, Priapulidae (Halicryptidae), Priapus Worms, Primary Bud, Primary Circlet, Primary Consumers, Primary Denticle, Primary Epithelium, Primary Fiber, Primary Host, Primary Intergradation, Primary Iris Cells, Primary Ligament, Primary Ocelli, Primary Oocyte, Primary Organizer, Primary Pigment Cells, Primary Producer, Primary Reproductive, Primary Riblet, Primary Royal Pair, Primary Segmentation, Primary Setae, Primary Sex Ratio, Primary Sexual Characters, Primary Shell Layer, Primary Somatic Hermaphrodite, Primary Spicule, Primary Teeth, Primary Zooid, Primary/Periodical Pleometrosis, Primaxil, Primer Effect, Primibrachs, Primitive, Primitive Form of Association Approaching Symbiosis, Primitive Groove, Primitive Knot, Primogyne, Primordial, Primordial Valve, Primordiotrichy, Primordium, Principal Cells, Principal Gland, Principalia, Priodont, Prionoceridae, Prionodont, Prionodonta (Eutaxodonta), Priority, Priscoan, Prisere, Prismatic, Prismatic Layer, Pro-Acrosome, Proala, Proandry, Proaposematic, Probable Mutation Effect, Probasipodite, Probofossa, Probolae, Proboscides, Proboscidial Fossa, Proboscidiform, Proboscipedia, Proboscis Bulb, Proboscis Lobe, Proboscis Pore, Proboscis Sheath, Proboscis Worms, Proboscis, Proboscises, Probursal, Procaryote, Procephalic Lobes, Procercoid, Procerebrum, Process, Processes, Processi Longi, Processus Ventralis, Prochoanitic, Prochorion, Prociliata, Proclinate, Procoria, Procorpus, Procruscula, Procrypsis, Procryptic Colors, Proctal, Proctiger, Proctodaeal Feeding, Proctodeal Valve, Proctodaeum (Proctodeum), Proctodone, Proctostome, Proctotrupidae, Proctotrupoidea (Proctotrypoidea, Serphoidea), Procumbent, Procurved, Procuticle, Prodehiscence, Prodelphic, Prodissoconch, Prodorsal Dehiscence, Prodorsum, Prodoxidae, Prodrome, Produced, Producer, Productivity, Proecdysis, Proembryo, Proeminent, Proenchium, Proepilobous, Proepimeron, Proepipodites, Proepisematic, Proepistome, Proeusternum, Profundal Zone, Progamic Sex Determination, Progenesis, Progenital, Progenital Chamber, Progenital Lips, Progenitor, Progeny, Proglottis (Proglottid), Prognathous, Progoneata, Progoneate, Prograde, Progredientes, Progressive Evolution, Progressive Provisioning (Progressive Feeding), Progynous, Prohaematocytes (Prohaemocytes), Prohaptor, Prohormone, Projapygidae, Projicient, Prokaryon (Protokaryon), Prokaryote, Prokaryotes, Prolabium, Prolecithophora, Prolegs (Propes, False Legs), Proles, Proleucocyte, Proleucocytoid, Prolicide, Proliferation, Proliferation Zone, Proliferous, Prolobic, Proloculum, Prolymphocyte, Promegaloblast (Proerythrocyte, Rubriblast), Promentum, Promerites, Promesonotal Suture, Prometaphase (Metakinesis, Premetaphase), Prominence, Promiscuity, Promitosis, Promonocyte, Promorphology, Promotion, Promuscis, Promyal Passage, Pronate, Pronotal Comb, Pronotum, Pronucleus, Pronymph, Pronymphal Membrane Embryonic Cuticle), Proorchic, Pro-Ostracum, Propalticidae, Proparamere, Proparea, Propedes, Propeltidium, Propes, Prophalangopsidae (Haglidae), Prophallus, Prophase, Prophragma, Proplegma, Proplegmatium, Propleural Bristles, Propleuron (Propleurum, Propleura), Propneustic, Propodeal Apophyses, Propodeon (Propodium, Epinotum, Latreille’s Segment, Median Segment), Propodite, Propodium, Propodosoma, Propodus, Propolar Cells, Propolis, Propped, Proprioception, Proprioceptor (Proprioreceptor), Propriogenic, Proprioreceptor, Propulsive Pseudopodium, Propupa, Propus, Propygidium, Prorachis, Proral, Prorhabdion, Prorsad, Prorsal, Prosartema, Proscinidae, Proscolex, Proscopiidae (Proscopidae), Prosepta, Prosicula, Prosiphon, Prosiphonate Lining, Prosobranchia (Streptoneura), Prosochete, Prosocline, Prosocoel, Prosocyrt, Prosodetic, Prosodus, Prosogyrate, Prosoma (Proterosoma), Prosome, Prosopon, Prosopora, Prosopore, Prosopyle, Prosotheca, Prostalia (Marginalia), Prostate Gland, Prostatic, Prostemmate (Prostemmatic), Prosternal Furrow, Prosternal Process, Spine Or Peg, Prosternum, Prostheca, Prostigmata (Trombidiformes), Prostome, Prostom, Prostomial Peaks, Prostomiate, Prostomium (Preoral Segment), Prostrate, Protaesthesis, Protamphibion, Protandrous Hermaphrodite, Protandry (Proterandry, Metgyny), Protanisoptera, Protarrhenotoky, Protaspis, Protective Coloration (Camou-Flage), Protective Zooid Or Polyp, Protegulal Node, Protegulum, Proteiform, Protein, Protelattosis, Protelean, Protembryo, Protentomidae, Protentomon, Proteocephalidea (Proteocephal-Oidea), Proteolytic Enzymes (Proteoclastic Enzymes), Protephemeroptera, Proterandria, Proterandry, Proterodehiscence, Proterogenesis, Proterogyny, Proterokont, Proterosoma, Proterospermophora (Polydesmida, Polydesmoidea), Proterostomia, Proterothesis, Proterozoic (Protozoic), Protheca, Prothetely (Paedogensis), Prothoracic Bristle, Prothoracic (Ecdysial, Pericardial, Thoracic, Ventral) Glands, Prothoracic, Prothoracic Shield, Prothorax (Corselet), Protoarthropoda, Protobiology, Protoblast, Protobranch, Protobranchia, Protobranchite, Protocephalic, Protocephalidea, Protocephalon, Protocerebral Bridge, (Pons Cerebralis), Protocerebral Region, Protocerebrum (Protocerebron), Protociliata (Prociliata), Protocnemes, Protococcaceae, Protocoel, Protocoleoptera, Protoconch, Protocooperation, Protocorm, Protocranium, Protodichthadiigyne, Protodonata, Protoecium, Protofibrils, Protogastric Lobe/Area, Protogenesis, Protogenic, Protogyne, Protogynous Hermaphrodite, Protogyny, Protogyrodactyloides, Protohymenoptera, Protokaryon, Protologue, Protomala, Protomedusae, Protomerite, Protomite, Protomont, Protomorphic, Protonephridial, Protonephridium, Protonephromixium, Protoneuridae, Protoneurone, Protonymph, Protonymphon Larva, Protopathic, Protoperlaria, Protoplasm, Protoplast (Energid), Protoplax, Protopod, Protopod Larva, Protopodite (Sympodite), Protorthoptera, Protoscolex, Protosoma, Protostasy, Protosternum, Protostom, Protostoma, Protostomes (Protostomata), Protostomia, Protostracum, Protostyle, Prototaxy, Prototergite, Prototheca, Protothelytoky, Prototheoridae, Prototracheata, Prototroch, Prototrochophore Larva, Prototrochula Larva, Prototrophic, Prototype, Protozoaea (Protozoea, Prezoeal), Protozoic, Protozygote, Protract, Protractive, Protractor Muscles, Protractor Preputii, Protriaene, Protrusile, Protuberance, Protura (Myrientomata), Prouterus, Proventricular Valvule, Proventriculus, Provinculum, Provirus, Provisional Mandibles (Imaginal Cephalic Cocoon-Cutters), Provisioning, Proxagalea, Proximad, Proximal, Proximal Gill Wheal, Proximal Hemiseptum, Proximal Sensory Area, Proximoceptor, Prozona, Prozonite, Pruinose Pruinescence, Psalterium, Psammocharidae, Psammodrilida (Psammodrilo-Morpha), Psammodrilidae, Psammofauna, Psammon, Psammophilous, Psammophore, Pselaphidae, Pselaphognatha, Pseudambulacrum, Pseudanal Segment, Pseudaposematic (Pseudoaposematic), Pseudarolium, Pseudepipodite, Pseudepisematic (Pseudo-Episematic), Pseudergates, Pseudhaemal, Pseudholoptic, Pseudibacus (Pseudobaccus), Pseudimago, Pseudoacrorhagus, Pseudoalveloar, Pseudoannulation (Pseudoannuli-Form), Pseudoapolytic, Pseudoaposematic Colors, Pseudoaquatic, Pseudoarticulation, Pseudobaccus, Pseudoblastopore, Pseudoblepharoplast, Pseudobrachium, Pseudobranch, Pseudobulb, Pseudocaeciliidae, Pseudocardia, Pseudocardinal, Pseudocardium, Pseudocartilage, Pseudocellus, Pseudocephalon, Pseudocercus, Pseudochactoidea, Pseudochrysalis, Pseudocircle of Crochets, Pseudococcidae, Pseudocoel(e), Pseudocoel Cells, Pseudocoelomate, Pseudocoelomic Membranes, Pseudocoelomocytes, Pseudoconch, Pseudocone, Pseudocopulation, Pseudocrop, Pseudocruralium, Pseudoctenodont Shell, Pseudoculus, Pseudocyesis, Pseudodeltidium, Pseudoderm, Pseudodominance, Pseudo-Episematic, Pseudoerucism, Pseudofaeces (Pseudofeces), Pseudogamy (Pseudomixis, Pseudo-Fertilization, Somatogamy), Pseudogaster, Pseudogastrula, Pseudogene, Pseudogermes, Pseudogiant Fiber, Pseudogyne, Pseudohalteres, Pseudohaptor, Pseudoheart (Pseudocardium), Pseudohermaphrodite, Pseudo-Imagines, Pseudointerarea, Pseudolabia, Pseudolamellibranch Gill, Pseudolamellibranchiata, Pseudolateral, Pseudolestidae, Pseudolips, Pseudomanubrium, Pseudometamerism, Pseudomixis, Pseudomonocyclic, Pseudomyiasis, Pseudomyrmecinae, Pseudonavicella, Pseudonchs, Pseudonest, Pseudoneuroptera (Archiptera), Pseudonocytoid, Pseudonotum, Pseudonuclei, Pseudonychium, Pseudonymph, Semipupa, Pseudo-Osculum (Pseudostoma), Pseudopallium, Pseudoparenchyma, Pseudopenis, Pseudopenes, Pseudoperculum, Pseudophyllidea, Pseudopillar, Pseudoplacenta, Pseudoplacental Viviparity, Pseudoplasmodium, Pseudopod, Pseudopore, Pseudopregnancy (Pseudocyesis), Pseudoptera, Pseudopuncta, Pseudopunctate, Pseudopupa, Pseudopupillae, Pseudorhabdite, Pseudorostrum, Pseudosclerite, Pseudoscolex, Pseudoscorpiones (Chelonethida, Pseudoscorpionida), Pseudosegment, Pseudoselenizone, Pseudosematic, Pseudoserosa, Pseudosessile, Pseudosiphon, Pseudospherule, Pseudospondylium, Pseudostega, Pseudosternite, Pseudostigma, Pseudostigmatic Organ, Pseudostigmatidae, Pseudostoma, Pseudosymmetry, Pseudosymphilic, Pseudosymphile, Pseudotagma, Pseudotaxodont, Pseudotela, Pseudotetramerous, Pseudotrachea (Pseudotracheae), Pseudotrimerous, Pseudotroch, Pseudo-Unipolar, Pseudovarium, Pseudovelum, Pseudovesicles, Pseudovitellus, Pseudovum, Pseudozoaea, Pseudumbilicus, Psilidae, Psilopsocidae, Psocidae, Psocomorpha, Psocoptera (Copeognatha, Corro-Dentia), Psoroptidae, Psorosperms, Psuedodont, Psychidae, Psychodidae, Psychoidea, Psychomyiidae, Psychopsidae, Psychrophil, Psyllidae (Chermidae), Psyllipsocidae, Psylloidea, Ptenoglossate, Pteralia, Pterate, Pterergate, Pteridine, Pteriidae, Pterins (Pteridines), Pterioda, Pteriomorphia, Pternotorma, Pterobranchia, Pterocardiac Ossicles, Pterodinergate, Pteroid, Pteromalidae, Pteromorphae, Pteronarcidae, Pteropegum, Pterophoridae, Pteropleural Bristles, Pteropleurite, Pteropleurites, Pteropleuron, Pteropleura, Pteropoda, Pteropodial, Pterostigma, Pterote, Pterotheca, Pterothorax, Pterothysanidae, Pterotic, Pterygium, Pterygobranchiate, Pterygoda, Pterygogenea, Pterygoid, Pterygoideus Externus/Internus, Pterygomandibular, Pterygomaxillary, Pterygopalatine, Pterygopolymorphism, Pterygostomial Region (Jugal Region, Pterygostome), Pterygostomial Spine, Pterygota (Pterygote), Pthiridae, Ptiliidae, Ptilinal Suture, Ptilinum, Ptilodactylidae, Ptiloneuridae, Ptilota, Ptinidae, Ptychocyst, Ptychodactiaria, Ptychoderidae, Ptychoidy, Ptycholophous, Ptychopteridae, Puberulent, Pubescent, Pubic, Pubic Process, Puce, Pudendum, Puerulus, Pugs, Pulicida, Pulicidae, Pulicoidea, Pulmobranch(Ia), Pulmonarium, Pulmonary Cavity, Pulmonary Sac, Pulmonata, Pulp, Pulsatile Organs, Pulsatile Vesicles, Pulsating Vesicle, Pulverulent, Pulvillar, Pulvilliform, Pulvillus (Onychium, Pulvinulus), Pulvinar, Pulvinate, Pulvinus, Pumping Pharyngeal Tube, Punctae, Punctate Chromatophores, Punctate, Punctiform, Punctuated Equilibrium, Punctulate, Punctum, Puncture, Pungent, Punnett Square, Pupa, Pupa Adectica, Pupa Adheraena, Pupa Angularis, Pupa-Chromogenic Phase, Pupa-Chromoptic Phase, Pupa Coarctate, Pupa Conica, Pupa Custodiata, Pupa Dectica, Pupa Dermata, Pupa Exarate, Pupa Folliculata, Pupa Incompletae, Pupa Larvata, Pupa Libera, Pupa Nuda, Pupa Obtect, Pupa Subterranean, Pupate, Pupal-Adult Apolysis, Pupal Respiratory Horn, Pupariation, Puparium, Pupiferous, Pupiform (Pupoid), Pupigerous, Pupil, Pupillarium, Pupillarial, Pupillate, Pupipara, Pupiparous, Pupivorous, Pupoid, Pure Line, Purpuraceous, Purse-Web Spiders, Pustule, Pusule, Putrefaction, Pycnogonida (Pantopoda), Pycnogonomorpha, Pycnosis, Pygal, Pygasteroida, Pygidial Fringe, Pygidial Glands (Anal Glands), Pygidial Incision, Pygidial Plate, Pygidial Setae, Pygidicraniidae, Pygidium, Pygiopsyllidae, Pygmy (Pigmy) Male, Pygmy Locust, Pygmy Mole Cricket, Pygochord, Pygofer, Pygomere, Pygophore, Pygopid Loop, Pygopods, Pygostyle, Pygothripidae, Pyllopod, Pylochelidae, Pylocyte, Pyloric Caecae (Cecae), Pyloric Ossicle, Pyloric Sphincter, Pyloric Stomach (Pyloric Sac), Pyloric, Pyloric Valve, Pylorus, Pyraform Glands, Pyraform Organ, Pyralidae (Pyralididae), Pyralidoidea, Pyramid of Biomass, Pyramid of Energy, Pyramid of Numbers, Pyramid, Pyramidal, Pyramidellacea, Pyramidellidae, Pyraustidae, Pyrenophore, Pyretic, Pyrgomorphidae, Pyriform Sac, Pyriform Vesicle, Pyriform, Pyrochroidae, Pyroglyphidae, Pyrrhocoridae, Pyrrhocoroidea, Pyrrophyta, Pythidae.