aileron

American  

[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.

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aileron British  

/ ˈeɪlərɒn /

noun

1. a flap hinged to the trailing edge of an aircraft wing to provide lateral control, as in a bank or roll

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aileron Scientific  

/ ā′lə-rŏn′ /

1. 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.

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Etymology

Origin of aileron

1905–10; < French, equivalent to ail ( e ) ( see aisle) + -eron diminutive suffix