Etymology of the English word quadruplex
the English word
quadruplexderived from the Latin word
quadruplex (fourfold; having four parts, aspects)
derived from the Late Latin word
plicare (to fold; fold , bend, flex; multiply by X , X-tuple; add together)
derived from the Proto-Indo-European root
*plek-Date
The earliest known usage of quadruplex in English dates from the 19th century.
