[1] : The Collaborative International Dictionary of English v.0.48

quadruple \quad"ruple\, v. t. imp.  p. p. quadrupled; p.
   pr.  vb. n. quadrupling. l. quadruplare: cf. f.
   quadrupler.
   to multiply by four; to increase fourfold; to double; to
   double twice. --a. smith.
   1913 webster
see also:
quadrupled quadrupling 

[2] : The Collaborative International Dictionary of English v.0.48

quadruple \quad"ruple\, v. i.
   to be multiplied by four; to increase fourfold; to become
   four times as much.
   1913 webster

[3] : The Collaborative International Dictionary of English v.0.48

quadruple \quad"ruple\, a. l. quadruplus, from quattuor four:
   cf. f. quadruple. see quadrate, and cf. double.
   fourfold; as, to make quadruple restitution; a quadruple
   alliance.
   1913 webster

   quadruple time mus., that in which each measure is
      divided into four equal parts.
      1913 webster
see also:
quadrate double quadruple time 

[4] : The Collaborative International Dictionary of English v.0.48

quadruple \quad"ruple\, n. cf. f. quadruple, l. quadruplum.
   four times the sum or number; a fourfold amount; as, to
   receive to quadruple of the amount in damages.
   1913 webster

[5] : WordNet (r) 2.0

quadruple
     adj 1: having four units or components; "quadruple rhythm has four
            beats per measure"; "quadruplex wire" syn: quadruplicate,
             quadruplex, fourfold
     2: four times as great or many; "a fourfold increase in the
        dosage" syn: fourfold
     n : a quantity that is four times as great as another
     v : increase fourfold; "his stock earning quadrupled"
see also:
quadruplicate quadruplex fourfold 

Quadruple >> Q Words
Quadruple, definition of term: Quadruple
quadruple_pag1.html