- fourfold; quadruple.
- noting or pertaining to a system of telegraphy by which four messages may be transmitted simultaneously over one wire or communications channel.
Origin of quadruplex
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for quadruplex
A general knowledge of the principles of quadruplex and multiplex working.The British State Telegraphs
Hugo Richard Meyer
The next step was a quadruplex system, by means of which four messages may be transmitted over one wire at the same time.
The first quadruplex system was invented by Edison in 1874, and in four years it saved more than half a million dollars.
Quadruplex telegraph, sending four messages over one wire at the same time—Edison, 1873.
The quadruplex has not as a rule the same working efficiency that four separate wires have.Edison, His Life and Inventions
Frank Lewis Dyer and Thomas Commerford Martin
- consisting of four parts; fourfold
- denoting a type of television video tape recorder having four transversely rotating heads
C19: from Latin, from quadru- (see quadri-) + -plex -fold
Word Origin and History for quadruplex
Online Etymology Dictionary, © 2010 Douglas Harper