adjective
Having four components.
Of or relating to a system in telegraphy by which four messages (two in each direction) can be sent on one wire simultaneously.
Of or relating to an early videotape format with four magnetic record/reproduce heads mounted on a headwheel spinning transversely across the tape.
noun
(countable) A quadruplex system.
(uncountable) Clipping of quadruplex videotape, an early type of videotape with four magnetic record/reproduce heads mounted on a headwheel spinning transversely across the tape.
verb
(transitive) To make quadruplex.