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duplex

[doo-pleks, dyoo-] /ˈdu plɛks, ˈdyu-/
noun
3.
paper or cardboard having different colors, finishes, or stocks on opposite sides.
4.
Printing.
  1. a method of reproducing an illustration using two halftone plates, one black and the other in a color.
  2. a printing press equipped to print both sides of a sheet in one pass.
5.
Genetics. a double-stranded region of DNA.
adjective
6.
having two parts; double; twofold.
7.
(of a machine) having two identical working units, operating together or independently, in a single framework or assembly.
8.
pertaining to or noting a telecommunications system, as most telephone systems, permitting the simultaneous transmission of two messages in opposite directions over one channel.
verb (used with object)
9.
to make duplex; make or change into a duplex:
Many owners are duplexing their old houses for extra income.
Origin
1810-1820
1810-20; < Latin: twofold, double, equivalent to du(o) two + -plex -plex
Related forms
duplexity, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for duplexes

duplex

/ˈdjuːplɛks/
noun
1.
(US & Canadian) a duplex apartment or house
2.
a double-stranded region in a nucleic acid molecule
adjective
3.
having two parts
4.
(machinery) having pairs of components of independent but identical function
5.
permitting the transmission of simultaneous signals in both directions in a radio, telecommunications, or computer channel
Derived Forms
duplexity, noun
Word Origin
C19: from Latin: twofold, from duo two + -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 duplexes

duplex

adj.

1817, "composed of two parts," from Latin duplex, from duo "two" (see two) + -plex, from Greek plax (genitive plakos) "flat surface." The noun sense of "house for two families; two-story apartment" is American English, 1922.

Online Etymology Dictionary, © 2010 Douglas Harper
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