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trapeziumsmore about trapeziums

trapeziums


  1  definition  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Trapezium  \Tra*pe"zi*um\,  n.;  pl  E.  {Trapeziums},  L. 
  {Trapezia}.  [NL.,  fr  Gr  ?  a  little  table,  an  irregular 
  four-sided  figure,  dim.  of  ?  a  table,  for  ?;  ?  (see  {Tetra-}) 
  +  ?  foot,  akin  to  ?  foot;  hence  originally,  a  table  with 
  four  feet.  See  {Foot}.] 
  1.  (Geom.)  A  plane  figure  bounded  by  four  right  lines,  of 
  which  no  two  are  parallel. 
 
  2.  (Anat.) 
  a  A  bone  of  the  carpus  at  the  base  of  the  first 
  metacarpal,  or  thumb. 
  b  A  region  on  the  ventral  side  of  the  brain,  either  just 
  back  of  the  pons  Varolii  or  as  in  man,  covered  by 
  the  posterior  extension  of  its  transverse  fibers. 




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