sīˈkräməd.ə(r) noun
Etymology: International Scientific Vocabulary psychro- + -meter
: a hygrometer whose operation depends on two similar thermometers with the bulb of one being kept wet so that it is cooled as a result of evaporation and shows a temperature lower than that of the dry-bulb thermometer and with the difference between the thermometer readings constituting a measure of the dryness of the surrounding air
• psy·chro·met·ric |sīkrō|me.trik adjective