'seaplane' definitions:

Definition of 'seaplane'

noun

An airplane that can land on or take off from water; "the designer of marine aircraft demonstrated his newest hydroplane" [syn: seaplane, hydroplane]

verb

Glide on the water in a hydroplane [syn: hydroplane, seaplane]

From: GCIDE

Hydro-aeroplane \Hy"dro-a"["e]r*o*plane`\ (A["e]ronautics) An a["e]roplane with a boatlike or other understructure that enables it to travel on, or to rise from the surface of, a body of water by its own motive power; -- now usually referred to as a seaplane. [obsolescent] [Webster 1913 Suppl. +PJC]