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  1  definition  found 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
  Haematexylin  \H[ae]m`a*tex"y*lin\,  n.  [See  {H[ae]matoxylon}.] 
  The  coloring  principle  of  logwood.  It  is  obtained  as  a  yellow 
  crystalline  substance,  {C16H14O6},  with  a  sweetish  taste. 
  Formerly  called  also  {hematin}.