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3 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 plan·et·oid /ˈplænəˌtɔɪd/
 小行星

From: Webster's Revised Unabridged Dictionary (1913)

 Plan·et·oid n.  Astron. A body resembling a planet; an asteroid.
 ◄ ►

From: WordNet (r) 2.0

 planetoid
      n : any of numerous small celestial bodies composed of rock and
          metal that move around the sun (mainly between the orbits
          of Mars and Jupiter) [syn: asteroid, minor planet]