English word hygrometer comes from English -meter (Used to form the names of measuring devices.), English hygro- (Humidity. Moisture.)

Detailed word origin of hygrometer

Dictionary entry	Language	Definition
-meter	English (eng)	Used to form the names of measuring devices.
hygro-	English (eng)	Humidity. Moisture.
hygromètre	French (fra)	Hygrometer.
hygrometer	English (eng)	(meteorology) An instrument that measures the humidity of the air or other gases, especially the relative humidity.

Words with the same origin as hygrometer