quadruplicate
    adj 1: having four units or components; "quadruple rhythm has
           four beats per measure"; "quadruplex wire" [syn:
           quadruple, quadruplicate, quadruplex, fourfold,
           four-fold]
    n 1: any four copies; any of four things that correspond to one
         another exactly; "it was signed in quadruplicate"
    v 1: reproduce fourfold; "quadruplicate the bill"

Quadruplicate \Quad*ru"pli*cate\, v. t. [imp. & p. p.
   Quadruplicated; p. pr. & vb. n. Quadruplicating.] [L.
   quadruplicatus, p. p. of quadruplicare, fr. quadruple?
   fourfold. See Quadruplex.]
   To make fourfold; to double twice; to quadruple.
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Quadruplicate \Quad*ru"pli*cate\, a. [L. quadruplicatus, p. p.]
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   1. Fourfold; doubled twice; four times repeated; as, a
      quadruplicate ratio, or a quadruplicate proportion.
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   2. (Math.) Raised to the fourth power. [R.]
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