Webster's English Dictionary

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duplication

du.pli.ca.tion \.d(y)u:-pli-'ka--sh*n\ \'d(y)u:-pli-.ka-t-iv\ n 1a: an act 
   or process of duplicating  1b: the quality or state of being duplicated  2: 
   DUPLICATE, COUNTERPART  - du.pli.ca.tive aj