- pulldown period
- pulsactor
- pulse height
- pulse packet
- pulse tube
- pulsometer
- pulverization
- pump assembly
- pump head
- pump lift
- pump speed
- pumping-out
- punch-through
- punctual
- pure ice
- pure tone
- purity coil
- putrefactive spoilage
- pyroelectricity
- pyromagnetic
- pyrometallurgy
- Q-meter
- quadrant
- quadrature component
- punching
- puncture
- pure air
- pure scattering
- pure sound
- pure state
- pure variable
- purge drum
- purge pump
- purge unit
- purging arrangement
- purity
- purple
- PV value
- pyrolysis
- Q band
- quad
- quadratic factor
- quadrilateral
- quadrupolarisation
- quadrupole lens
- quantized vortices
- quantum acoustics
- quantum chaos
- quantum correction
- quantum crystal
- quantum dot
- quantum entanglement
- quantum jump
- quantum number
- quantum restriction
- quantum statistics
- quantum turbulence
- quantum-mechanical
- quantumization noise
- quark structure
- quarter
- quarter-wave
- quartz plate
- quasi-adiabatic
- quasi-atom
- quasi-canonical
- quasi-crystal
- quasi-momentum
- quasi-stable
- quasi-stationary
- quibinary
- pulsating current
- pulsating flow
- pulsating voltage
- pulse amplifier
- pulse detector
- pulse length
- pulse modulation
- pulse train
- pulse-like
- pulsimeter
- pulsing transformer
- pulverizer
- pump circulation
- pump feeding
- pump line
- pump receiver
- pump recirculation
- pump unit
- pumped storage
- pumping circuit
- pure refrigerant
- purified air
- purple plague
- purpose-made
- push-pull
- pyroconductivity
- pyroelectronic effect
- pyrophoric
- Q-domain