standard temperature and pressure
noun (used with a plural verb)
the temperature of 0°C and pressure of 1 atmosphere, usually taken as the conditions when stating properties of gases. Abbreviation: STP
Nearby words
standard schnauzer, standard score, standard scratch score, standard solution, standard temperature, standard temperature and pressure, standard time, standard volume, standard-bearer, standard-bred, standardbred
Also called standard conditions.
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019