Hydropneumatic
Pronunciation : Hy`dro*pneu*mat"ic
Part of Speech : a.
Etymology : [Hydro-, 1 + pneumatic: cf. F. hydropneumatique.]
Definition : Defn: Pertaining to, or depending upon, both liquid and gaseous substances; as, hydropneumatic apparatus for collecting gases over water or other liquids.
Source : Webster's Unabridged Dictionary, 1913