hydrostatics
noun
- branch of fluid mechanics
Wiktionary
noun
Etymology: Etymology tree Proto-Indo-European *wed- Proto-Indo-European *-r̥ Proto-Indo-European *wódr̥ Proto-Hellenic *údōr Ancient Greek ῡ̆̔́δωρ (hū̆́dōr) Ancient Greek ῠ̔δρο- (hŭdro-)der. English hydro- English statics English hydrostatics From hydro- + statics.
- The scientific study of fluids at rest, especially when under pressure.
“1774, Dr Samuel Johnson, Preface to the Works of the English Poets, J. Nichols, Volume II, Page 30, "to estimate his skill in hydrostatistics or astronomy; ..."”