from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A control surface on an airplane that combines the functions of an elevator and an aileron.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. a moveable surface at the trailing edge of a tailless airplane (such as the space shuttle) that provides pitch and roll control
elev(ator) + (ailer)on.(American Heritage® Dictionary of the English Language, Fourth Edition)
Blend of elevator and aileron (Wiktionary)