duplex

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duplex

1. US and Canadian a duplex apartment or house
2. Chemistry a double-stranded region in a nucleic acid molecule
3. Machinery having pairs of components of independent but identical function
4. Electronics permitting the transmission of simultaneous signals in both directions in a radio, telecommunications, or computer channel
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

Duplex

A house having a separate apartment for two families, especially a two-story house having two separate entrances and a complete apartment on each floor; an apartment with rooms on two connected floors.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved

duplex

[′dü‚pleks]
(engineering)
Consisting of two parts working together or in a similar fashion.
(graphic arts)
The technique of recording on roll microfilm the front and back image of a document in a single exposure.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

duplex

McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

duplex

(communications)
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://cit.ac.nz/smac/dc100www/dc_014.htm.
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duplex

Two way. See bidirectional, full-duplex and half-duplex.
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