duplex

Meanings

1. 1
   adj

   allowing communication in opposite directions simultaneously

   Duplex system.

2. 2
   adj

   (used technically of a device or process) having two parts

   A duplex transaction.

Borrowed from Latin duplex (“double, two-fold”), from duo (“two”) + plico (“fold together”); compare the roots of διπλόος (diplóos, “double”); compare also πλέκω (plékō, “twist, braid”). By surface analysis, duo- + -plex.

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