Ai"le*ron (?), n. [F., dim. of aile wing.]
1.
A half gable, as at the end of a penthouse or of the aisle of a church.
2. (Aëronautics)
A small plane or surface capable of being manipulated by the pilot of a flying machine to preserve or destroy lateral balance; a hinged wing tip; a lateral stabilizing or balancing plane.
© Webster 1913