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  1  definition  found 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
  Dufrenite  \Du*fren"ite\,  n.  [From  ??ierre  Armand  Dufr['e]noy,  a 
  French  geologist.]  (Min.) 
  A  mineral  of  a  blackish  green  color,  commonly  massive  or  in 
  nodules.  It  is  a  hydrous  phosphate  of  iron.