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  1  definition  found 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
  Attritus  \At*tri"tus\,  n.  [L.  attritus,  p.  p.  of  atterere  ad  + 
  terere  to  rub.] 
  Matter  pulverized  by  attrition.