Meaning

noun an airplane that can land on or take off from water

noun a speedboat that is equipped with winglike structures that lift it so that it skims the water at high speeds

verb glide on the water in a hydroplane

originEtymology 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 plane English hydroplane From hydro- + plane.

Etymology from Wiktionary, CC BY-SA 3.0