Pronunciation: (ôr'bi-tur), [key]
—n. U.S. Aerospace.
1. Also called space shuttle orbiter. the crew- and payload-carrying component of the space shuttle.
2. a space probe designed to orbit a planetary body or moon. Cf. lander.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.