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3 definitions found

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

 com·et /ˈkɑmət/
 慧星

From: Webster's Revised Unabridged Dictionary (1913)

 Com·et n.  Astron. A member of the solar system which usually moves in an elongated orbit, approaching very near to the sun in its perihelion, and receding to a very great distance from it at its aphelion. A comet commonly consists of three parts: the nucleus, the envelope, or coma, and the tail; but one or more of these parts is frequently wanting. See Illustration in Appendix.
 

From: WordNet (r) 2.0

 comet
      n : (astronomy) a relatively small extraterrestrial body
          consisting of a frozen mass that travels around the sun
          in a highly elliptical orbit