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echinoidea

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echinoidea


  2  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Echinoidea  \Ech`i*noi"de*a\,  n.  pl  [NL.  See  {Echinus},  and 
  {-oid}.]  (Zo["o]l.) 
  The  class  Echinodermata  which  includes  the  sea  urchins.  They 
  have  a  calcareous,  usually  more  or  less  spheroidal  or 
  disk-shaped,  composed  of  many  united  plates,  and  covered  with 
  movable  spines.  See  {Spatangoid},  {Clypeastroid}.  [Written 
  also  {Echinidea},  and  {Echinoida}.] 
 
  From  WordNet  r  1.6  [wn]: 
 
  Echinoidea 
  n  :  sea  urchins  and  sand  dollars  [syn:  {Echinoidea},  {class 
  Echinoidea}] 




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