Search Result for "aileron": 
Wordnet 3.0

NOUN (1)

1. an airfoil that controls lateral motion;

The Collaborative International Dictionary of English v.0.48:

Aileron \Ai"le*ron\ ([=a]"l[-e]*r[o^]n), n. [F., dim. of aile wing.] 1. A half gable, as at the end of a penthouse or of the aisle of a church. [Webster 1913 Suppl.] 2. (A["e]ronautics) A small plane or surface capable of being manipulated by the pilot of a flying machine to control lateral balance; a hinged wing tip; a lateral stabilizing or balancing plane. [Webster 1913 Suppl.]
WordNet (r) 3.0 (2006):

aileron n 1: an airfoil that controls lateral motion