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comet

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comet


  2  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Comet  \Com"et\,  n.  [L.  cometes  cometa,  from  Gr  ?  comet,  prop. 
  long-haired,  fr  ?  to  wear  long  hair,  fr  ?  hair,  akin  to  L. 
  coma:  cf  F.  com[`e]te.]  (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  1.6  [wn]: 
 
  comet 
  n  :  (astronomy)  a  relatively  small  celestial  body  consisting  of 
  a  frozen  mass  that  travels  around  the  sun  in  a  highly 
  elliptical  orbit 




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