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  1  definition  found 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
  Echinodermata  \E*chi`no*der"ma*ta\ 
  ([-e]*k[imac]`n[-o]*d[~e]r"m[.a]*t[.a]),  n.  pl  [NL.,  fr  Gr 
  'echi^nos  hedgehog,  sea  urchin  +  de`rma,  -atos,  skin.] 
  One  of  the  grand  divisions  of  the  animal  kingdom.  By  many 
  writers  it  was  formerly  included  in  the  Radiata.  [Written 
  also  {Echinoderma}.]