perp - phot
- perpelic
- perpendicular light scattering
- perpendicular magnetization
- perpendicular planes
- perpetual snow belt
- perpetuity
- perpetuum mobile
- perphenazine
- perphosphoric
- perrhenate
- perrhenic
- perrhutenate
- perrotine
- perrutenate
- perrutenic
- persalt
- Persian red
- persistence
- persistent infection
- persistent photoconductivity
- persister
- persistex
- persisting elongation
- personal area
- personal fitness
- personality board
- personnel defections
- personnel survival equipment
- persorption
- persorption mixture
- perspective geometry
- perspectivity
- perspex
- perspiration fastness
- perstillation
- persulphate
- persulphuric
- pertantalic
- perthiocarbonate
- perthiocarbonic
