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planorbis

planorbis


  1  definition  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Planorbis  \Pla*nor"bis\,  n.  [NL.,  fr  L.  planus  flat  +  orbis  a 
  circle.]  (Zo["o]l.) 
  Any  fresh-water  air-breathing  mollusk  belonging  to 
  {Planorbis}  and  other  allied  genera,  having  shells  of  a 
  discoidal  form