asteroid
- Noun. (astronomy) A naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star.
- Noun. (astronomy) In the Solar system, such a body that orbits within the orbit of Jupiter.
- Noun. (zoology) Any member of the taxonomic class Asteroidea; a starfish.
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This entry was last updated on RefTopia from its source on 3/20/2012.