Either of two movable flaps on the wings of an airplane that can be used to control the plane's rolling and banking movements.
A pilot-controlled airfoil attached to, in, or near the trailing edge of an airplane wing, for controlling the rolling movements of the airplane.
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.
Origin of aileron
- French diminutive of aile wing from Old French from Latin āla
From American Heritage Dictionary of the English Language, 5th Edition
- Borrowing from French aileron, diminutive of aile (“wing”), also refers to the extremities of a bird's wings used to control their flight. It first appeared in print in the 7th edition of Cassell's French-English Dictionary of 1877, with its lead meaning of "small wing". In the context of powered airplanes it appears in print about 1908, in the French aviation journal L'Aérophile.