- plastochondria
- plastodeme
- plastogen
- plastomere
- platiculture
- platycephalic
- pleiochasim
- pleiocyclic
- pleuroblastic
- plicate
- plurinuclear
- plectron
- pleiomery
- plethysmograph
- plicated
- plurisegmental
- pluteus
- pneumatotactic
- pneumatotaxis
- pneumotaxis
- plagiosere
- planation
- plankton
- planoconidium
- plasmatogamy
- plasmodesm
- plasmolyse
- plasmotomy
- plastid
- plastidule
- plastocyte
- plastolysis
- plastorhexis
- pole-capsule
- pole-cell
- pollinoid
- polycystic
- polygeny
- polyisomere
- polykaric
- polymerous
- polymorphocellular
- polymorphonuclear
- polyonychia
- polyparasitism
- polyplanetic
- polysomaty
- polytene
- polytopic
- pollinodium
- polyblast
- polyembryonic
- polyembryony
- polygene
- polygenesis
- polyglandular
- polymolecular
- polymorphic
- polymorphism
- polymorphous
- polynuclear
- polyoestrous
- polyphyletic
- polyploid
- polysaprobit
- polysomic
- preadaptation
- praeaxial
- praecentrum
- precipitin
- precommunity
- preformism
- prepotency
- prepotent
- preprophase
- pretesticular
- preferendum
- preformation
- preganglionic
- pregenital
- prepotence
- prepupa
- prickly
- procercoid
- prochromosome
- pressor
- presubstance
- prisere
- progamete
- prolan
- proliferate
- proliferation
- prophage
- proliferous
- promycelium
- pronuclei
- pronucleus
- prophase
- proplastid
- propolar