Parkinson's disease
Parshall Flume (Improved Venturi Flume)
parthenocarpy
parthenogenesis
Partial Beam Filling
partial digest
Partial-Duration Flood Series
Particle acceleration
Particle displacement
particle radiation
Particle size
Particle Trajectory Model
Particle velocity
particulate
Particulate Matter (PM)
| Particulates
Partly Cloudy
Partly Sunny
Parts Per Billion (ppb)
parts per million
Parts Per Million (ppm)
parturition
Pascal
Pascal (Pa)
pass
passage
passage number
passage time
Passive earth pressure
passive immunity
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