Hydroscope

Definition:

• (n.) An instrument designed to mark the presence of water, especially in air.
• (n.) A kind of water clock, used anciently for measuring time, the water tricking from an orifice at the end of a graduated tube.

Compare hydroscope with other words:

hydroscope vs. hygroscope

hydroscope vs. water

hydroscope vs. surface

device vs. hydroscope