(adj) having four units or components, Syn. fourfold, four-fold, quadruplex, quadruplicate, Example:quadruple rhythm has four beats per measure; quadruplex wire
The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
v. t. [ imp. & p. p. Quadruplicated p. pr. & vb. n. Quadruplicating. ] [ L. quadruplicatus, p. p. of quadruplicare, fr. quadruple&unr_; fourfold. See Quadruplex. ] To make fourfold; to double twice; to quadruple. [ 1913 Webster ]