Bible Dictionaries
Hydroscope

Webster's Dictionary

(1):

(n.) An instrument designed to mark the presence of water, especially in air.

(2):

(n.) A kind of water clock, used anciently for measuring time, the water tricking from an orifice at the end of a graduated tube.

Bibliography Information
Webster, Noah. Entry for 'Hydroscope'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​h/hydroscope.html. 1828.