• (n.) Hygrometry.
Psy·chrom'e·try noun Hygrometry. 
Type: Term Pronunciation: sī-krom′ĕ-trē Definitions: 1. The calculation of relative humidity and water vapor pressures from wet and dry bulb temperatures and barometric pressure; whereas relative humidity is the value ordinarily employed, the vapor pressure is the measurement of physiologic significance. Synonyms: hygrometry &n...
psychrometry 1. The study of the physical laws that influence air and water mixture. 2. The calculation of relative humidity and water vapor pressures from wet and dry bulb temperatures and barometric pressure; whereas relative humidity is the value ordinarily employed, the vapor pressure is the measurement of physiological significance.
the employment of the psychrometer. · the science of measuring the water-vapor content of the air.