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quadruplex

[kwod-roo-pleks, kwo-droo-pleks] /ˈkwɒd rʊˌplɛks, kwɒˈdru plɛks/
adjective
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.
Origin
1870-1875
1870-75; < Latin; see quadru-, -plex
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for quadruplex
  • Rooms are clustered in quadruplex configurations and have tile floors, high slanted ceilings, and white rattan furnishings.
British Dictionary definitions for quadruplex

quadruplex

/ˈkwɒdrʊˌplɛks; kwɒˈdruːplɛks/
adjective
1.
consisting of four parts; fourfold
2.
denoting a type of television video tape recorder having four transversely rotating heads
Derived Forms
quadruplicity (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
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Word Origin and History for quadruplex
adj.

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
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quadruplex in Technology

communications
A kind of telegraphy system developed by Thomas A. Edison in the 1870s combining diplex and duplex communications to support simultaneous transmission of two messages in each direction.
(2000-04-02)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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