Ps

PS
Metric horsepower
PSD
A method of scaling the amplitude axis of spectra of random rather than deterministic signals.
Pseudocore
Electrons in d or f subshells which are outside the noble gas core.
psi
A letter of the Greek alphabet.
psi
An abbreviation of pounds per square inch, a British imperial unit of pressure. 1.0 psi = 6894.757 Pa
psia
Gauge pressure plus local atmospheric pressure.
psid
Difference between two pressures.
psig
Difference between the measuring point and the local pressure.
psisg
psi sealed gauge; difference between a chamber of air sealed at atmospheric pressure and the pressure at the measuring point.
psivg
psi vented gauge; difference between the measuring point and the local pressure.
PSWR
Abbreviation of Power Standing Wave Ratio.
Psychoacoustics
The study of the interaction of the auditory system and acoustics.
Psychrometer
An instrument used to determine the dry and wet bulb temperature of air simultaneously.
Psychrometric Chart
A chart that shows relationship between the temperature, pressure and moisture content of the air.
Psychrometry
The study of air-vapour mixtures.