[ kwod-roo-pleks, kwo-droo-pleks ]
/ ˈkwɒd rʊˌplɛks, kwɒˈdru plɛks /


fourfold; quadruple.
noting or pertaining to a system of telegraphy by which four messages may be transmitted simultaneously over one wire or communications channel.

Origin of quadruplex

From Latin, dating back to 1870–75; see origin at quadru-, -plex
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for quadruplex

British Dictionary definitions for quadruplex


/ (ˈkwɒdrʊˌplɛks, kwɒˈdruːplɛks) /


consisting of four parts; fourfold
denoting a type of television video tape recorder having four transversely rotating heads
Derived Formsquadruplicity (ˌkwɒdrʊˈplɪsɪtɪ), noun

Word Origin for quadruplex

C19: from Latin, from quadru- (see quadri-) + -plex -fold
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for quadruplex



1875, in reference to telegraph systems in which four messages can be wired simultaneously, from quadru- + plex. In classical Latin, quadruplex meant "fourfold, quadruple," as a noun, "a fourfold amount."

Online Etymology Dictionary, © 2010 Douglas Harper