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airfoil

[air-foil] /ˈɛərˌfɔɪl/
noun, Aeronautics
1.
any surface, as a wing, aileron, or stabilizer, designed to aid in lifting or controlling an aircraft by making use of the air currents through which it moves.
Origin
1920-1925
1920-25; air1 + foil2
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for airfoils

airfoil

/ˈɛəˌfɔɪl/
noun
1.
(US & Canadian) a cross section of an aileron, wing, tailplane, or rotor blade Also called aerofoil
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 airfoils

airfoil

n.

1922, U.S. form of aerofoil.

Online Etymology Dictionary, © 2010 Douglas Harper
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airfoils in Science
airfoil
  (âr'foil')   
A structure having a shape that provides lift, propulsion, stability, or directional control in a flying object. An aircraft wing provides lift by causing air to pass at a higher speed over the wing than below it, resulting in greater pressure below than above. Propellers are airfoils that are spun rapidly to provide propulsion. See more at Bernoulli effect, See Note at aerodynamics.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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