- Prehabilitation
- Prehnite-pumpellyite facies
- Preinitiation complex
- Preisach model
- Preload
- Premalignant
- Premature aging
- Premature atrial contraction
- Premature chromosome condensation
- Premature convergence
- Premature ventricular contraction
- Premelting
- Premises
- Premium efficiency
- Premixed flames
- Premotor cortex
- Prenatal diagnosis
- Prenylation
- Preoptic area
- Preorder
- Prepaid
- Prephenate
- Prepolymer
- Preprocessor
- Presbycusis
- Presbyopia
- Prescaler
- Prescriptive analytics
- Presence information
- Presenilin
- Presentation
- Presentism
- Preservatives
- Presheaf
- Press brake
- Press cake
- Press hardening
- Pressed wood
- Pressure altimeter
- Pressure altitude
- Pressure angle
- Pressure coefficient
- Pressure cookers
- Pressure cooking
- Pressure drop
- Pressure exchanger
- Pressure gradient
- Pressure gradient force
- Pressure grouting
- Pressure head
- Pressure measurement
- Pressure overload
- Pressure regulator
- Pressure ridges
- Pressure sewer
- Pressure solution
- Pressure swing adsorption
- Pressure switch
- Pressure ulcers
- Pressure vessels
- Pressure-gradient force
- Pressure-retarded osmosis
- Pressure-sensitive adhesive
- Pressure-sensitive paint
- Pressure-sensitive tape
- Pressuremeter test
- Pressurization
- Pressurized
- Prestack
- Prestressed concrete
- Preterm birth
- Pretopological space
- Prevalence
- Prevent
- Prevention through design
- Preventive action
- Preventive healthcare
- Preventive medicine
- Prewitt operator
- Price of anarchy
- Price of stability
- Prim's algorithm
- Primary alcohols
- Primary biliary cirrhosis
- Primary carbon
- Primary cell culture
- Primary cells
- Primary decomposition
- Primary energy
- Primary key
- Primary metabolites
- Primary minerals
- Primary motor cortex
- Primary olfactory cortex
- Primary ovarian insufficiency
- Primary progressive aphasia
- Primary qualities
- Primary radar
- Primary sequence
- Primary somatosensory cortex
- Primary sources
- Primary standard
- Prime
- Prime ideals
- Prime numbers
- Prime power
- Primer dimer
- Primer extension
- Primers
- Priming effect
- Primitive elements
- Primitive equations
- Primitive mantle
- Primitive polynomials
- Primitives
- Primum non nocere
- Principal
- Principal axes
- Principal component regression
- Principal curvature
- Principal ideal
- Principle
- Principle of covariance
- Principle of least action
- Principle of least privilege
- Principle of maximum entropy
- Principle of minimum energy
- Principle of original horizontality
- Principle of relativity
- Print-through
- Printed electronics
- Printf
- Prints
- Prion
- Prior distribution
- Prior probability
- Prioritization
- Priority ceiling protocol
- Priority encoder
- Priority inheritance
- Priority inversion
- Priority queue
- Priority review
- Prirazlomnoye field
- Prism coupler
- Prism dioptre
- Prismatic joint
- Prismatic surface
- Prisms