WordReference Random House Unabridged Dictionary of American English © 2017
ice•boat  (īsbōt′),USA pronunciation n. 
  1. Nautical, Naval Termsa vehicle for rapid movement on ice, usually consisting of aT-shaped frame on three runners driven by a fore-and-aft sailing rig or, sometimes, by an engine operating a propeller.
  2. Nautical, Naval Termsa boat for breaking a navigable channel through ice;
    icebreaker.
  • ice + boat 1745–55

'iceboat' also found in these entries:
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