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  1  definition  found 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
  Cementation  \Cem`en*ta"tion\,  n. 
  1.  The  act  or  process  of  cementing. 
  2.  (Chem.)  A  process  which  consists  in  surrounding  a  solid 
  body  with  the  powder  of  other  substances,  and  heating  the 
  whole  to  a  degree  not  sufficient  to  cause  fusion,  the 
  physical  properties  of  the  body  being  changed  by  chemical 
  combination  with  powder;  thus  iron  becomes  steel  by 
  cementation  with  charcoal,  and  green  glass  becomes 
  porcelain  by  cementation  with  sand.