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hydrofoil

[hahy-druh-foil] /ˈhaɪ drəˌfɔɪl/
noun
1.
Naval Architecture. a surface form creating a thrust against water in a direction perpendicular to the plane approximated by the surface.
2.
Nautical.
  1. a winglike member having this form, designed to lift the hull of a moving vessel.
  2. a vessel equipped with hydrofoils.
Origin of hydrofoil
1915-1920
1915-20; hydro-1 + foil2
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for hydrofoil

hydrofoil

/ˈhaɪdrəˌfɔɪl/
noun
1.
a fast light vessel the hull of which is raised out of the water on one or more pairs of fixed vanes
2.
any of these vanes
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for hydrofoil
n.

1959, "boat that travels through water on wings," short for hydrofoil boat, originally the name of the "wings" themselves (1920); formed in English from hydro- + foil (n.).

Online Etymology Dictionary, © 2010 Douglas Harper
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