Placodontia

Placozoa

Placozoan genome

Plague

Plains

Planck mission

Planck's constant

Planck's radiation law

Plane curve

Plane geometry

Planer

Planet

Planetarium

Planetary gear train

Planetary nebula

Plant

Plant anatomy

Plant breeding

Plant cell

Plant cell wall

Plant communication

Plant defense against herbivorous insects

Plant defense against pathogens

Plant development

Plant dormancy

Plant evolution

Plant geography

Plant growth

Plant hormone

Plant hormone receptor

Plant hybrid vigor

Plant juvenility

Plant keys

Plant kingdom

Plant MAP kinase phosphatases

Plant metabolism

Plant mineral nutrition

Plant movement

Plant nomenclature

Plant organs

Plant pathogen forensics

Plant pathology

Plant phylogenomics

Plant phylogeny

Plant physiology

Plant pigment

Plant primary vascular system

Plant propagation

Plant protoplast

Plant reproduction

Plant reproductive incompatibility

Plant respiration

Plant root hairs as a model cell system

Plant taxonomy

Plant tissue system

Plant virus

Plant vulnerability to climate change

Plant–animal interactions

Plant-produced volatile organic compounds

Plant-water relations

Plantaginales

Plants of saline environments

Plasma (physics)

Plasma diagnostics

Plasma propulsion

Plasmid

Plasmin

Plasmodiophorida

Plasmon

Plasmonics

Plaster

Plaster of paris

Plastic deformation of metals

Plasticity

Plastics processing

Plate girder

Plate tectonics

Plateau

Platinum

Platyasterida

Platycopida

Platycopioida

Platyctenida

Platyhelminthes

Platypus

Playa

Plecoptera

Pleiades

Pleistocene

Plenoptic imaging

Pleochroic halos

Pleochroism

Plesiosauria

Pleuronectiformes

Pliocene

Plum

Plumbaginales

Plume imagery

Plumes and banded iron formations

Pluto