from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. See asteroid.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An asteroid which orbits the Sun and is larger than 10 meters in diameter but smaller than a dwarf planet.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. any of numerous small celestial bodies that move around the sun


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