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.
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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