\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. (A["e]ronautics) 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.