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tetrabranchiata

tetrabranchiata


  1  definition  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Tetrabranchiata  \Tet`ra*bran`chi*a"ta\,  n.  pl  [NL.  See 
  {Tetra-},  and  {Branchia}.]  (Zo["o]l.) 
  An  order  of  Cephalopoda  having  four  gills.  Among  living 
  species  it  includes  only  the  pearly  nautilus.  Numerous  genera 
  and  species  are  found  in  the  fossil  state,  such  as  Ammonites, 
  Baculites,  Orthoceras,  etc