psychrometric

Main Entry: psy·chrom·e·ter
Pronunciation: sI-'kräm-&t-&r
Function: noun
: a hygrometer consisting essentially of twosimilar thermometers with the bulb of one being kept wet so that the cooling that results from evaporation makes it register a lower temperature than the dry one and with the difference between thereadings constituting a measure of the dryness of the atmosphere —psy·chro·met·ric /"sI-kr&-'me-trik/ adjective —psy·chrom·e·try /sI-'kräm-&-trE/ noun plural -tries

psychrometer psy·chrom·e·ter (sī-krŏm'ĭ-tər)
n.
An instrument that uses the difference in readings between thermometers specialized to measure the moisture content or relative humidity of air.