'Hydro-aeroplane' definitions:

Definition of 'Hydro-aeroplane'

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]