| Hygrometer (n.) An instrument for measuring the degree of moisture of the atmosphere. Thesaurus Entries aerological instrument, aneroid barometer, aneroidograph, barograph, barometer, barometrograph, glass, hair hygrometer, humidor, hurricane-hunter aircraft, hygrodeik, hygrograph, hygroscope, hygrostat, hygrothermograph, psychrometer, radiosonde, recording barometer, sling psychrometer, vacuometer, weather balloon, weather instrument, weather satellite, weather vane, weatherglass |