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  1  definition  found 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
  Brookite  \Brook"ite\,  n.  [Named  from  the  English  mineralogist, 
  H.  J.  Brooke.]  (Min.) 
  A  mineral  consisting  of  titanic  oxide,  and  hence  identical 
  with  rutile  and  octahedrite  in  composition,  but  crystallizing 
  in  the  orthorhombic  system.