- duplex apartment.
- duplex house.
- paper or cardboard having different colors, finishes, or stocks on opposite sides.
- a method of reproducing an illustration using two halftone plates, one black and the other in a color.
- a printing press equipped to print both sides of a sheet in one pass.
- Genetics. a double-stranded region of DNA.
- having two parts; double; twofold.
- (of a machine) having two identical working units, operating together or independently, in a single framework or assembly.
- pertaining to or noting a telecommunications system, as most telephone systems, permitting the simultaneous transmission of two messages in opposite directions over one channel.
- to make duplex; make or change into a duplex: Many owners are duplexing their old houses for extra income.
Origin of duplex
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- US and Canadian a duplex apartment or house
- a double-stranded region in a nucleic acid molecule
- having two parts
- machinery having pairs of components of independent but identical function
- permitting the transmission of simultaneous signals in both directions in a radio, telecommunications, or computer channel
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
Word Origin and History for duplexity
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