English
hydrobarometer
From hydro- + barometer.
Formed from hydro- + barometer
Proto-Indo-European *wed- ‘water’
Proto-Indo-European *wódr̥ ‘water’
Proto-Hellenic *údōr ‘water’
Ancient Greek ῡ̆̔́δωρ ‘water’
English hydro-
Today it means
noun An early form of depth gauge, that measured water pressure, as well as temperature.
Language periods are conventional ranges, not dates for this word.
Etymograph / hydrobarometer