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From The Collaborative International Dictionary of English v.0.44 [gcide]:
Duplex \Du"plex\, verb (used with an object) [See {Duplex}, adjective] (Teleg.) To arrange, as a telegraph line, so that two messages may be transmitted simultaneously; to equip with a duplex telegraphic outfit. [Webster 1913 Suppl.]
From The Collaborative International Dictionary of English v.0.44 [gcide]:
duplex \du"plex\, noun [See {Duplex}, adjective]
1. something which is duplex; -- used mostly in reference to a living unit, such as an apartment, in a building having two similar living units. [PJC]
2. (Biology, Genetics) a double-stranded region in a nucleic acid molecule. See {deoxyribonucleic acid}. [PJC]
From The Collaborative International Dictionary of English v.0.44 [gcide]:
Duplex \Du"plex\, adjective [L., fr. duo two + plicare to fold. See {Two}, and {Complex}.]
1. Double; twofold.
2. (Computers) organized so that data may be transmitted in two opposite directions over the same channel; -- of communications channels, such as data transfer lines between computers. [PJC]
{Duplex escapement}, a peculiar kind of watch escapement, in which the scape-wheel has two sets of teeth. See {Escapement}.
{Duplex lathe}, one for turning off, screwing, and surfacing, by means of two cutting tools, on opposite sides of the piece operated upon.
{Duplex pumping engine}, a steam pump in which two steam cylinders are placed side by side, one operating the valves of the other.
{Duplex querela} [L., double complaint] (Eccl. Law), a complaint in the nature of an appeal from the ordinary to his immediate superior, as from a bishop to an archbishop. --Mozley & W.
{Duplex telegraphy}, a system of telegraphy for sending two messages over the same wire simultaneously.
{Duplex watch}, one with a duplex escapement.
{half duplex} (Computers) (a) arranged so that the information may be transmitted in both directions, but only in one direction at a time; -- of communications channels between computers; contrasted with {full duplex(a)}. (b) arranged so that the information transmitted to the remote computer also appears on the local terminal; -- of communications channels between computers; contrasted with {full duplex(b)}.
{full duplex}, (Computers) (a) arranged so that the information may be transmitted in both directions simultaneously; -- of communications channels between computers; contrasted with {half duplex(a)}. (b) arranged so that the information transmitted to the remote computer does not appear on the local terminal; -- of communications channels between computers; contrasted with {half duplex(b)}.
From WordNet (r) 2.0 [wn]:
duplex
adjective
1: (used technically of a device or process) having two parts; "a duplex transaction"
2: allowing communication in opposite directions simultaneously; "duplex system"; "duplex telephony"
noun
1: a house with two units sharing a common wall [syn: {duplex house}, {semidetached house}]
2: an apartment having rooms on two floors that are connected by a staircase [syn: {duplex apartment}]
From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]:
49 Moby Thesaurus words for "duplex": Janus-like, ambidextrous, apartment house, bifacial, bifold, biform, bifurcated, bilateral, binary, binate, biparous, bipartisan, bipartite, bivalent, condominium, conduplicate, cooperative apartment house, dichotomous, disomatous, double, double-barreled, double-faced, duadic, dual, dualistic, duple, duplex house, duplicate, duplicated, dyadic, flats, geminate, geminated, high-rise apartment building, identical, matched, second, secondary, tenement, twain, twin, twinned, two, two-faced, two-level, two-ply, two-sided, two-story, twofold
From The Free On-line Dictionary of Computing (27 SEP 03) [foldoc]:
duplex Used to describe a communications channel that can carry signals in both directions, in contrast to a {simplex} channel which only ever carries a signal in one direction. If signals can only flow in one direction at a time the communications is "{half-duplex}", like a single-lane road with traffic lights at each end. Walkie-talkies with a "press-to-talk" button provide half-duplex communications. If signals can flow in both directions simultaneously the communications is "{full-duplex}", like a normal two-lane road. Telephones provide full-duplex communications. The term "duplex" was first used in wireless, telegraph, and telephone communications. Nearly all communications circuits used by computers are two-way, so the term is seldom used. {(http://www.cit.ac.nz/smac/dc100www/dc_014.htm)}. (2001-07-21)
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