As nouns the difference between hydroscope and hygroscope
is that hydroscope is a device for viewing objects below the surface of the water while hygroscope is an instrument that indicates changes in atmospheric humidity.
hydroscope
English
Noun
(
en noun)
A device for viewing objects below the surface of the water.
Related terms
* hydroscopy
hygroscope
English
Noun
(
en noun)
An instrument that indicates changes in atmospheric humidity
Related terms
* hygroscopic