plesiopids
plural of plesiopid

plethodontid
Any of the Plethodontidae, a family of lungless salamanders.

plethodontids
plural of plethodontid

pleurobranch
Any of the gills of certain crustaceans, such as some shrimp, that are attached to the side of the thorax

pleurobranchs
plural of pleurobranch

pleurocidin
A piscidin present in flounders of the genus Pleuronectes.

pleurocidins
plural of pleurocidin

pleuronectid
Any species of the family Pleuronectidae.

pleuronectids
plural of pleuronectid

pleurosaur
Any of the genus †Pleurosaurus of extinct reptiles.

pleurosaurs
plural of pleurosaur

pleurostomatid
Any ciliate of the class Pleurostomatida

pleurostomatids
plural of pleurostomatid

pleurotomariacean
Any gastropod of the superfamily Pleurotomariacea.

pleurotomariid
Any in the family Pleurotomariidae of gastropods.

pleurotomariids
plural of pleurotomariid

pleurotomarioid
Synonym of pleurotomariid.

pleurotomarioidean
Any gastropod of the superfamily †Pleurotomarioidea.

pleuston
The organisms that live floating at the surface of water.
Plants that live floating at the surface of water.

plexaurid
Any octocoral of the family Plexauridae

plexaurids
plural of plexaurid

pliosauroid
Any pliosaur of the suborder Pliosauroidea

pliosauroids
plural of pliosauroid

plurispore
An algal spore that develops within a plurilocular sporangium.

plurispores
plural of plurispore

podiate
Any organism of the clade Podiata.

podoctid
Any harvestman of the family Podoctidae.

podoctids
plural of podoctid

podonid
Any onychopod of the family Podonidae

podonids
plural of podonid

podurid
Any in the family Poduridae of springtails.

podurids
plural of podurid

poduromorph
Any springtail of the order Poduromorpha

poduromorphs
plural of poduromorph

poecilosclerid
Any demosponge of the order Poecilosclerida

poecilosclerids
plural of poecilosclerid

pokie
Synonym of poker machine, an electronic game of chance played for money, especially slot machines.

poliovirus
A human enterovirus of the Picornaviridae family that causes poliomyelitis.

polioviruses
plural of poliovirus

polybaramin
A grouping of organisms that belong to different holobaramins.

polybaramins
plural of polybaramin

polycalin
A lipocalin associated with the silkworm (of genus Bombyx)

polycalins
plural of polycalin

polycentrid
Any leaffish in the family Polycentridae.

polycentrids
plural of polycentrid

polygeneses
plural of polygenesis

polygenesis
The genesis of a species from more than one ancestor.
The theory that living organisms originate in cells or embryos of different kinds, instead of coming from a single cell; as opposed to monogenesis.
The theory that languages developed independently in different places at different periods, as opposed to originating from a single source.
The emergence from multiple causes or origins.

polygeny
Polygenesis.
The control of a single trait, or phenotype, by multiple genes.

polymatin
Any of a group of melampolides found in Polymnia species.

polymatins
plural of polymatin

polymixiid
Any beardfish in the family Polymixiidae.

polymixiids
plural of polymixiid

polymorphid
Any acanthocephalan in the family Polymorphidae.

polymorphids
plural of polymorphid

polyodontoid
Any paddlefish of the family Polyodontidae

polyodontoids
plural of polyodontoid

polyoxomolybdate
Any of several complex, polymeric anions composed of molybdate and oxyanion species

polyoxomolybdates
plural of polyoxomolybdate

polyphylogeny
Lineage through several lines.

polysporangia
plural of polysporangium

polysporangium
A sporangium that contains many spores
A sporangium that contains polyspores

polytypism
The existence of multiple types, especially of multiple subspecies.
The existence of multiple forms differing in only one of the dimensions of the unit cell.

polytypisms
plural of polytypism

polytypy
polytypism

pomacanthid
Any marine angelfish in the family Pomacanthidae.

pomacanthids
plural of pomacanthid

pomphorhynchid
Any acanthocephalan in the family Pomphorhynchidae.

pomphorhynchids
plural of pomphorhynchid

pondhawk
Any of several dragonflies, of the genus Erythemis, native to North America.

poposaurid
Any archosaur in the family Poposauridae.

poposaurids
plural of poposaurid

poposauroid
Any pseudosuchian of the clade Poposauroidea

poposauroids
plural of poposauroid

porcellionid
Any woodlouse in the family Porcellionidae.

porcellionids
plural of porcellionid

porocephalid
Any tongueworm of the order Porocephalida

porocephalids
plural of porocephalid

porotaxy
The characteristic arrangement of pores on a species.

porphyromonad
Any bacterium of the family Porphyromonadaceae.

porphyromonads
plural of porphyromonad

porpitid
Any hydrozoan of the family Porpitidae

porpitids
plural of porpitid

pospiviroid
Any viroid in the family Pospiviroidae.

pospiviroids
plural of pospiviroid

pospivirus
Any viroid of the family Pospiviroidae

pospiviruses
plural of pospivirus

potoo
Any species of the family Nyctibiidae within the order Nyctibiiformes related to the nightjars (order Caprimulgiformes), and found from southern Mexico to southern Brazil.

prasinodermophyte
Any of the organisms, of the phylum Prasinodermophyta.

prayid
Any siphonophore in the family Prayidae

prayids
plural of prayid

prayine
Any siphonophore of the family Prayidae

prayines
plural of prayine

prestosuchid
Any archosaur in the family Prestosuchidae.

prestosuchids
plural of prestosuchid

prickletail
A genus of birds...

pristerognathid
Any therocephalian of the genus Pristerognathus

pristerognathids
plural of pristerognathid

pristiophoriform
Any sawshark of the order Pristiophoriformes

pristiophoriforms
plural of pristiophoriform

pristolepidid
Any leaffish of the family Pristolepididae

pristolepidids
plural of pristolepidid

proamanullin
An amatoxin present in mushrooms of the genus Amanita

probacteria
plural of probacterium

probacterium
Any probiotic bacterium

probainognathid
Any cynodont in the family Probainognathidae.

probainognathids
plural of probainognathid

probiogenomics
The genomics of probiotic bacteria

procolophonid
Any parareptile in the family †Procolophonidae

procolophonids
plural of procolophonid

procolophonoid
Any parareptile of the superfamily Procolophonoidea.

procolophonoids
plural of procolophonoid

procynosuchid
Any cynodont in the family Procynosuchidae.

procynosuchids
plural of procynosuchid

proflavin
Alternative form of proflavine.

proflavine
A disinfectant, acridine-3,6-diamine, bacteriostatic against many gram-positive bacteria

projapygid
Any dipluran in the family Projapygidae.

projapygids
plural of projapygid

promeropid
Any of the sugarbirds in the family Promeropidae.

promeropids
plural of promeropid

promethea
A silkmoth of species Callosamia promethea.

prometheas
plural of promethea

pronase
A mixture of proteinases isolated from the extracellular fluid of the bacterium Streptomyces griseus.

pronases
plural of pronase

propionibacteria
plural of propionibacterium

propionibacterium
Any of various saprophytic gram-positive bacteria, of the genus Propionibacterium, that occur in milk and in the intestines, some of which are pathogenic, but others of which produce the holes in Swiss cheese

propria
plural of proprium

proprium
A property that applies to all members of a species and only to them, serving to distinguish the species from other species within the same genus, yet is not part of the true definition or the essence of the species.

protentomid
Any proturan in the family Protentomidae.

protentomids
plural of protentomid

proteobacteria
plural of proteobacterium

proteobacterium
Any microbe of the phylum Proteobacteria, many of which are pathogenic.

proteocephalidean
Any tapeworm of the order Proteocephalidea

proteocephalideans
plural of proteocephalidean

proterochampsid
Any archosaur in the family Proterochampsidae.

proterochampsids
plural of proterochampsid

proterogyrinid
Any embolomere in the family Proterogyrinidae.