Biology Dictionary: P
Search or browse the dictionary for the definition of biology terms starting with the letter “P”.
Dictionary > P
P
- P face
- P1
- P680
- Pace
- Pacemaker
- Pachynema
- Pachytene
- Pacinian corpuscles
- Packaging
- Packed cell volume
- Pain
- Pair
- Pair-rule gene
- Palaearctic realm
- Palaeobotany
- Paleoneurology
- Paleozoic
- Palm
- Palma manus
- Palmar crease
- Palmar surface
- Palmate
- Palmitic acid
- Palmitin
- Palp
- Pancreas
- Pancreatic juice
- Pancreatic lipase
- Pandemic
- Pangenesis
- Pant
- Pantherinae
- Paper chromatography
- Papilionaceous
- Papilla incisiva
- Papillary dermis
- Papovaviridae
- Papyraceous scars
- Paracentric inversion
- Paracrine
- Paracrine signaling
- Paracystitis
- Paradenitis
- Parallax
- Parallel evolution
- Paralogy
- Parameter
- Paramorphism
- Paramural body
- Parapatric speciation
- Paraphyletic
- Parasagittal
- Parasagittal plane
- Parasegment
- Parasite
- Parasitism
- Parasitoid
- Parasitoidism
- Parasitology
- Parasymbiosis
- Parasympathetic nervous system
- Paratenic host
- Parazoa
- Parchment skin
- Parenchyma
- Parent
- Parent cell
- Parental generation
- Parenteral
- Parenthesome
- Parietal cell
- Parietes
- Paroxysmal cerebral dysrhythmia
- Pars basilaris ossis occipitalis
- Parthenogenesis
- Partial pressure
- Partially-permeable membrane
- Particle
- Particulate inheritance
- Parvorder
- Paschen bodies
- Passive agglutination
- Passive immunity
- Passive transport
- Passive vasodilation
- Past-pointing
- Pasteur effect
- Patau syndrome
- Patella
- Patellar reflex
- Patent
- Paternity
- Pathogen
- Pathogenicity
- Pathologic
- Pathophysiology
- Pathotoxin
- Pattern formation
- Pawn
- PBI test
- Pea
- Peach
- Peak plasma drug concentration
- Peanut
- Pearl
- Pectinase
- Pedal
- Pedicel
- Pedicle
- Pedigree
- Pedigree analysis
- Pedipalp
- Pedunculated
- Peg-and-socket joint
- Pellets
- Pelvic axis
- Pelvic brim
- Pelvic cavity
- Pelvic girdle
- Pelvic inlet
- Pelviperitonitis
- Pelvis
- Pendular movement
- Penetrance
- Penetration
- Penile spine
- Penis
- Penis erection of the
- Pennate muscle
- Penniform muscle
- Pentadactyl Limb
- Pentapeptide
- Pentose
- Pentose phosphate pathway
- PEP carboxylase
- PEPC
- Pepo
- Peptic ulcer
- Peptide
- Peptide bond
- Peptide hormone
- Peptidoglycan
- Peptone
- Perception
- Perceptual closure
- Perceptual distortion
- Perch
- Perennation
- Perennial
- Perfect flower
- Perfect fungi
- Perforations
- Perfusion
- Pericardium
- Pericarp
- Pericentric inversion
- Periderm
- Perimysium
- Perineum
- Perineurium
- Perinuclear space
- Periocular
- Period
- Periosteum
- Peripatric speciation
- Peripheral
- Peripheral membrane protein
- Peripheral nervous system
- Periphery
- Periphyton
- Perisinusoidal space
- Peristalsis
- Peristolic
- Peritoneoscopy
- Peritoneum
- Peritonism
- Peritonitis
- Permeability
- Permeable
- Permease
- Permutation
- Peroxidase
- Peroxisome
- Perpendicular fasciculus
- Perpetuating factors
- Persistence
- Person-years
- Perspiration
- Pes
- Pes valgus
- Pes varus
- Pest
- Petal
- Petaloid
- Petiolate
- Petiolate plant
- Petiole
- Petri dish
- Petrotympanic fissure
- PGA
- PH Scale
- Phagedenic ulcer
- Phagocyte
- Phagocytosis
- Phagolysosome
- Phagosome
- Phagotrophy
- Phalanges
- Phantom
- Pharmaceutical preparations
- Pharmacology
- Pharynx
- Phasic
- Phelloderm
- Phenol
- Phenol coefficient
- Phenolase
- Phenotype
- Phenotype frequency
- Phenotypic percentage
- Phenotypic ratio
- Phenylalanine
- Pheomelanin
- Pheromone
- Phialides
- Philippine tarsier
- Phloem
- Phloem fiber
- Phloem parenchyma
- Phloem sclerenchyma
- Phobias
- Phosphatase
- Phosphate
- Phosphate group
- Phosphodiester bond
- Phosphoenolpyruvate
- Phospholipid
- Phospholipid bilayer
- Phosphorescence
- Phosphoric Acid
- Phosphorylation
- Photic Zone
- Photoautotroph
- photobiology
- Photodecomposition
- Photoheterotroph
- Photolithotrophic autotroph
- Photolysis
- photomedicine
- Photometers
- Photon
- Photoperiodism
- Photophobic
- Photoreceptor
- Photorespiration
- Photosynthesis
- Photosystem
- Photosystem I
- Photosystem II
- Phototaxis
- Phototroph
- Phototropism
- Phycobilin
- Phycology
- Phyletic gradualism
- Phyletic lineage
- Phyllode
- Phylogenetic tree
- Phylogenetics
- Phylogeny
- Phylum
- Physalia physalis
- Physical containment
- Physical endurance
- Physical fitness
- Physical science
- Physicology
- Physiological
- Physiological adaptation
- Physiological processes
- Physiology
- Phytochrome
- Phytoflagellate
- Phytohemagglutinin
- Phytohormones
- Phytomastigophora
- Phytoplankton
- Pial-glial membrane
- Pictograph
- Pigment
- Piles
- Pili
- Pillar cells
- Pills
- Pine
- Pineal gland
- Pinealocyte
- Pinocytosis
- Pinworm
- Pioneer plant
- Pioneer species
- Piscivore
- Pistillate
- Pit
- Pitcher
- Pith
- Pituicyte
- Pituitary gland
- Pivot
- Placenta
- Placental mammal
- Placentalia
- Planar chromatography
- Planaria
- Plane
- Plane suture
- Plankton
- Plant
- Plant association
- Plant cell
- Plant extracts
- Plantae
- Plantar
- Plantations
- Plantigrade
- Plants edible
- Plaque assay
- Plaque-forming unit
- Plaques
- Plasma
- Plasma B cell
- Plasma volume
- Plasmablast
- Plasmid
- Plasmodesmata
- Plasmodium
- Plasmolysis
- Plaster of paris disease
- Plastic embedding
- Plastid
- Platelet
- Platyrrhine
- Pleiotropy
- Pleocytosis
- Pleomorphic
- Plica caecalis vascularis
- Plica vestibularis
- Ploidy
- Plp
- Plumage
- Plume
- Plumes
- Plums
- Plumule
- Plural pregnancy
- Pluripotent
- Pneumatophore
- Pneumomycosis
- Poa
- Pod
- Poietin
- Poikilotherm
- Point mutation
- Poison
- Pol gene
- Polar
- Polar body
- Polar compound
- Polar molecule
- Polar solvents
- Polarity
- Polarization
- Polarized light
- Polenske number
- Poles
- Pollen Grain
- Pollex
- Pollutant
- Pollution
- Pollux
- Poly
- Poly a tail
- Polyadenylation
- Polycythemia
- Polygamy
- Polygene
- Polygenic disease
- Polygenic inheritance
- Polygenic trait
- Polymenorrhoea
- Polymer
- Polymerase
- Polymerization
- Polymorph
- Polymorphism
- Polynucleotide
- Polyol
- Polyp
- Polypeptide
- Polyphyletic
- Polyploid
- Polyploidy
- Polypoid
- Polyprotein
- Polysaccharide
- Polysomy
- Polyspermia
- Polyspermy
- Polytene chromosome
- Polytomous key
- Polyunsaturated fatty acid
- Polyvalent
- Pomes
- Pomology
- Pondweed
- Pons
- Pooled serum
- Poorly drained soil
- Popliteal line
- Population
- Population characteristics
- Population density
- Population genetics
- Population pyramid
- Pores
- Port
- Portal caval system
- Portal vein
- Portal-systemic anastomoses
- Porter
- Portio minor nervi trigemini
- Positional cloning
- Positive feedback
- Postanal gut
- Postencephalon
- Posterior
- Posterior tympanic artery
- Postmortem
- Postsynaptic
- Postsynaptic cell
- Postulate
- Potato
- Potato nose
- Potato tumour of neck
- Potency
- Potential energy
- Potential resource
- Potentiality
- Pouch of douglas
- Pouches
- Pp
- Pre-ejaculate
- Preadaptation
- Preauricular
- Prechiasmatic sulcus
- Precipitate
- Precipitating factors
- Precursor
- Precursor mRNA
- Predation
- Predator
- Predator-prey relationship
- Predisposing factors
- Pregnancy
- Prehensile
- Prehensile tail
- Prehension
- Premature contact
- Premaxillary suture
- Preoral gut
- Prepuce
- Preputium clitoridis
- Prescription
- Preservation
- Presynaptic
- Presynaptic cell
- Presynaptic terminals
- Prevalent
- Prey
- Prezone
- Pribnow box
- Prickles
- Primary cell wall
- Primary consumer
- Primary Growth
- Primary meristem
- Primary oocyte
- Primary phloem
- Primary producers
- Primary productivity
- Primary structure
- Primary succession
- Primary transcript
- Primary xylem
- Primase
- Primate
- Primer
- Primer extension
- Primiparity
- Primiparous
- Primitive
- Primordial
- Prion
- Prions
- Private blood group
- Pro-
- Probability
- Probe
- Probiosis
- Problem
- Proboscis
- Procambium
- Process
- Prochordal plate
- Procollagen peptidase
- Prodromal period
- Prodromal stage
- Producer
- Product
- Proerythroblast
- Profusion
- Progenitor
- Progenitor cell
- Progeny
- Progesterone
- Progestogen
- Prognathous
- Prohormone
- Projections
- Prokaryote
- Prokaryotic cell
- Prolactin
- Prolactin-releasing hormone
- Prolamellar body
- Proliferation
- Proliferative inflammation
- Promastigote
- Promegakaryocyte
- Prometaphase
- Promoter
- Promoter gene
- Promoter insertion
- Pronation
- Pronucleus
- Propagate
- Propagated thrombus
- Propepsin
- Prophase
- Prophase I
- Prophase II
- Proplastid
- Proportion
- Proprioception
- Proprioceptor
- Prosimian
- Prostacyclin
- Prostaglandin
- Prostaglandin F2-alpha
- Prosthetic group
- Protective factors
- Protein
- Protein coat
- Protein domain
- Protein pump
- Protein synthesis
- Proteinoplast
- Proteobacteria
- Proteoglycan
- Proteolytic Enzyme
- Proteome
- Prothorax
- Prothrombin
- Protist
- Protista
- Protistology
- Proto-oncogene
- Protocell
- Protoderm
- Protomer
- Proton
- Proton donor
- Proton gradient
- Proton-motive force
- Protonema
- Protonophore
- Protophloem
- Protoplasm
- Protoplast
- Protoscience
- Prototherian mammal
- Protoxylem
- Protozoa
- Protozoan cyst
- Protozoology
- Protrusions
- Protuberance
- Provacuole
- Providencia alcalifaciens
- Providencia rettgeri
- Provirus
- Provisional denture
- Provitamin d3
- Proximal
- Prune
- Pseudocoelomate
- Pseudodominance
- Pseudogamy
- Pseudopodia
- Pseudostratified columnar epithelium
- Pseudostratified epithelium
- Pseudovitamin b12
- Pseudoxanthoma cell
- Psychic determinism
- Psychological techniques
- Psychrometer
- Psychrophile
- Pteron
- Pterygomandibular raphe
- Pterygomaxillary notch
- Ptyalin
- Pubic
- Pubic region
- Pubis
- Puffball
- Pulmonary circulation
- Pulmonary hypostasis
- Pulmonary valve
- Pulmonary ventilation
- Pulmonary venule
- Pulsatile flow
- Pulse
- Pulse deficit
- Pulse-chase experiment
- Pulsus magnus
- Pulsus parvus et tardus
- Pulvinus
- Pump
- Pumpkin
- Punctate
- Punctuated equilibrium
- Punctum caecum
- Punctum proximum
- Punnett Square
- Pupil
- Pupillary light reflex
- Pure science
- Purebred
- Purine
- Purulence
- Purulent
- Purulent exudate
- Pus
- Pus cell
- Pus corpuscle
- Pussy
- Putative
- Putnam-dana syndrome
- Putrefaction
- Pyramid of Numbers
- Pyramid of Productivity
- Pyriform
- Pyrimidine
- Pyrogen
- Pyrophosphate
- Pyruvate
- Pyruvic acid