American Heritage® Dictionary of the English Language, Fourth Edition
- n. A movable airfoil, especially a rudder, aileron, or elevator, used to control or guide an aircraft, guided missile, or rocket.
- n. aeronautics A moveable surface attached to a machine such as an aircraft or submarine that can be used to control the machine's motion in roll, pitch or yaw.
- n. a device that provides reactive force when in motion relative to the surrounding air; can lift or control a plane in flight
“Instantaneously, he thought about the loss of the small fuel tank at the tip of his right wing the “tip tank”, plus the serious damage to his starboard aileron, the moveable control surface attached to the trailing edge of the wing.”
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