• synonyms


[kwod-roo-pleks, kwo-droo-pleks]
See more synonyms for quadruplex on Thesaurus.com
  1. fourfold; quadruple.
  2. noting or pertaining to a system of telegraphy by which four messages may be transmitted simultaneously over one wire or communications channel.
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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. 2018

Examples from the Web for quadruplex

Historical Examples

  • A general knowledge of the principles of quadruplex and multiplex working.

    The British State Telegraphs

    Hugo Richard Meyer

  • The first quadruplex system was invented by Edison in 1874, and in four years it saved more than half a million dollars.

    The Story of Great Inventions

    Elmer Ellsworth Burns

  • The next step was a quadruplex system, by means of which four messages may be transmitted over one wire at the same time.

    The Story of Great Inventions

    Elmer Ellsworth Burns

  • Quadruplex telegraph, sending four messages over one wire at the same time—Edison, 1873.

    The Story of Great Inventions

    Elmer Ellsworth Burns

  • At this juncture other schemes were fermenting in his brain; but the quadruplex engrossed him.

    Edison, His Life and Inventions

    Frank Lewis Dyer and Thomas Commerford Martin

British Dictionary definitions for quadruplex


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

Word Origin

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."

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Online Etymology Dictionary, © 2010 Douglas Harper