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aileron

[ey-luh-ron] /ˈeɪ ləˌrɒn/
noun
1.
Aeronautics. a movable surface, usually near the trailing edge of a wing, that controls the roll of the airframe or effects maneuvers, as banks and the like.
2.
a wall at the end of a roof with a single slope, as that of a church aisle.
Origin of aileron
1905-1910
1905-10; < French, equivalent to ail(e) (see aisle) + -eron diminutive suffix
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Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for aileron

aileron

/ˈeɪlərɒn/
noun
1.
a flap hinged to the trailing edge of an aircraft wing to provide lateral control, as in a bank or roll
Word Origin
C20: from French, diminutive of aile wing
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 aileron
n.

1909, from French aileron, altered (by influence of aile "wing"), from French aleron "little wing," diminutive of Old French ele "wing" (12c.), from Latin ala "wing" (see aisle).

Online Etymology Dictionary, © 2010 Douglas Harper
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aileron in Science
aileron
  (ā'lə-rŏn')   
A hinged surface that is part of the back edge of each wing on an airplane. The ailerons are moved up or down to create uneven lift on the sides of the plane to control its rolling and tilting movements.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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