Definition of quadruplex
:being or relating to a system of telegraphy by which two messages in each direction may be sent simultaneously over one wire
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quadruplex
adjective
quad·ru·plex
\
ˈkwädrəˌpleks
\
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Origin and Etymology of quadruplex
Latin quadruplic-, quadruplex fourfold, from quadri- + -plic-, -plex -fold
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