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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