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columella

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columella


  1  definition  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Columella  \Col`u*mel"la\,  n.  [L.,  dim.  of  columen  column.  See 
  {Column}.] 
  1.  (Bot.) 
  a  An  axis  to  which  a  carpel  of  a  compound  pistil  may  be 
  attached,  as  in  the  case  of  the  geranium;  or  which  is 
  left  when  a  pod  opens. 
  b  A  columnlike  axis  in  the  capsules  of  mosses. 
 
  2.  (Anat.)  A  term  applied  to  various  columnlike  parts  as 
  the  columella,  or  epipterygoid  bone,  in  the  skull  of  many 
  lizards;  the  columella  of  the  ear,  the  bony  or 
  cartilaginous  rod  connecting  the  tympanic  membrane  with 
  the  internal  ear. 
 
  3.  (Zo["o]l.) 
  a  The  upright  pillar  in  the  axis  of  most  univalve 
  shells. 
  b  The  central  pillar  or  axis  of  the  calicles  of  certain 
  corals. 




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