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asteridea


asteridea

 

  1  definition  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Asterioidea  \As*te`ri*oid"e*a\,  Asteridea  \As`ter*id"e*a\,  n. 
  pl  [NL.,  fr  Gr  'asteri`as  +  -oid.  See  {Asterias}.] 
  (Zo["o]l.) 
  A  class  of  Echinodermata  including  the  true  starfishes.  The 
  rays  vary  in  number  and  always  have  ambulacral  grooves  below. 
  The  body  is  star-shaped  or  pentagonal.