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  1  definition  found 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
  Indican  \In"di*can\,  n.  [See  {Indigo}.] 
  1.  (Chem.)  A  glucoside  obtained  from  woad  (indigo  plant)  and 
  other  plants,  as  a  yellow  or  light  brown  sirup.  It  has  a 
  nauseous  bitter  taste,  a  decomposes  or  drying.  By  the 
  action  of  acids,  ferments,  etc.,  it  breaks  down  into  sugar 
  and  indigo.  It  is  the  source  of  natural  indigo. 
  2.  (Physiol.  Chem.)  An  indigo-forming  substance,  found  in 
  urine,  and  other  animal  fluids,  and  convertible  into  red 
  and  blue  indigo  (urrhodin  and  uroglaucin).  Chemically,  it 
  is  indoxyl  sulphate  of  potash,  {C8H6NSO4K},  and  is  derived 
  from  the  indol  formed  in  the  alimentary  canal.  Called  also