Bible Dictionaries
Hydropneumatic

Webster's Dictionary

(a.) Pertaining to, or depending upon, both liquid and gaseous substances; as, hydropneumatic apparatus for collecting gases over water or other liquids.

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