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Noun. a moveable surface at the trailing edge of a tailless airplane (such as the space shuttle) that provides pitch and roll control.This is an unmodified, but possibly outdated, definition from Wiktionary and used here under the Creative Commons license. Wiktionary is a great resource. If you like it too, please donate to Wikimedia.
This entry was last updated on RefTopia from its source on 3/20/2012.