CIDE DICTIONARY
quadruple,
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.
quadruple, 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]
quadruple, v. t. [L. quadruplare: cf. F. quadrupler.].
OXFORD DICTIONARY
quadruple, adj., n., & v.
--adj.
1 fourfold.
2 a having four parts. b involving four participants (quadruple alliance).
3 being four times as many or as much.
4 (of time in music) having four beats in a bar.
--n. a fourfold number or amount.
--v.tr. & intr. multiply by four; increase fourfold.
quadruply adv.
F f. L quadruplus (as QUADRI-, -plus as in duplus DUPLE)
ROGET THESAURUS
quadruple
Quadruplication
N
quadruplication, fourfold, four times, quadrable, quadrumanous,
quadruple, quadruplicate, quadrible, fourth, quadrifoliate, quadrifoliolate, quadrigeminal, quadrigeminate, quadriplanar, quadriserial, four times, in the fourth place, fourthly.