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  1  definition  found 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
  Bistort  \Bis"tort\,  n.  [L.  bis  +  tortus,  p.  p.  of  torquere  to 
  twist:  cf  F.  bistorte.]  (Bot.) 
  An  herbaceous  plant  of  the  genus  {Polygonum},  section 
  {Bistorta};  snakeweed;  adderwort.  Its  root  is  used  in 
  medicine  as  an  astringent.