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Duplicate \Du"pli*cate\, v. t. [imp. & p. p. {Duplicated}; p.
pr. & vb. n. {Duplicating}.]
1. To double; to fold; to render double.
2. To make a duplicate of (something); to make a copy or
transcript of. --Glanvill.
3. (Biol.) To divide into two by natural growth or
spontaneous action; as, infusoria duplicate themselves.