- phyllostome
- phylloxera
- pike
- pinnule
- pipe-fish
- pipit
- pimelode
- pink
- pinna
- pinniped
- pintado
- pipistrel
- pismire
- placentalia
- phyllophagous
- pichiciago
- pilot-fish
- pine-beauty
- pine-marten
- pinnae
- pinnothere
- pintail
- plathelmintha
- platyhelminth
- platypus
- plecopteran
- pleurobranchiae
- plume
- plumule
- plesiops
- pleuralia
- plover
- pleopod
- pneumatic
- poachard
- placoid
- plaice
- plantigrade
- podex
- podobranchiae
- podophyllous
- pogonophoran
- poikilotherm
- poikilothermism
- polar beaver
- polatouche
- pollack
- pollock
- polydactyl
- polygamous
- polyp
- polype
- polypod
- polystome
- pond-mussel
- pondfish
- porbeagle
- porgy
- porcellain-shell
- porcupine
- porpoise
- poll-sheep
- polyphagia
- polyphagous
- pompano
- pond-snail
- pongo
- poulp
- pouter
- poyou
- praecoces
- praecocial
- prairie-wolf
- pratincole
- prawn
- potto
- pouch
- poulpe
- pout
- praecostal
- prairie-chicken
- prairie-dog
- precornu
- predaceous
- predacity
- predation
- predatory
- precocial
- prehensility
- premandibular
- prespermatid
- prehensile
- premorse
- presacious
- prespawning
- prespiracular
- primates
- prickle
- proalar
- proboscidian