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  3  definitions  found 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
  Calcar  \Cal"car\,  n.  [L.  calcaria  lime  kiln,  fr  calx,  calcis, 
  lime.  See  {Calx}.]  (Glass  manuf.) 
  A  kind  of  oven,  or  reverberatory  furnace,  used  for  the 
  calcination  of  sand  and  potash,  and  converting  them  into 
  frit.  --Ure. 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
  Calcar  \Cal"car\,  n.;  L.  pl  {Calcaria}.  [L.,  a  spur,  as  worn  on 
  the  heel,  also  the  spur  of  a  cock,  fr  calx,  calcis,  the 
  1.  (Bot.)  A  hollow  tube  or  spur  at  the  base  of  a  petal  or 
  2.  (Zo["o]l.)  A  slender  bony  process  from  the  ankle  joint  of 
  bats,  which  helps  to  support  the  posterior  part  of  the 
  web,  in  flight. 
  3.  (Anat.) 
  a  A  spur,  or  spurlike  prominence. 
  b  A  curved  ridge  in  the  floor  of  the  leteral  ventricle 
  of  the  brain;  the  calcar  avis,  hippocampus  minor,  or 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
  2.  (Zo["o]l.)  A  genus  of  lophobranch  fishes  of  several 
  species  in  which  the  head  and  neck  have  some  resemblance 
  to  those  of  a  horse;  --  called  also  {sea  horse}. 
  Note:  They  swim  slowly,  in  an  erect  position,  and  often  cling 
  to  seaweeds  by  means  of  the  incurved  prehensile  tail. 
  The  male  has  a  ventral  pouch,  in  which  it  carries  the 
  eggs  till  hatched. 
  3.  (Zo["o]l.)  A  name  applied  to  either  of  two  ridges  of  white 
  matter  in  each  lateral  ventricle  of  the  brain.  The  larger 
  is  called  hippocampus  major  or  simply  hippocampus.  The 
  smaller,  hippocampus  minor,  is  called  also  {ergot}  and