See Also: quadruplex(medicine)
quadruplex(dictionary)

quadruplex (iou)



quadruplex adjective & verb. L19.
[Latin = fourfold, formed as QUADRU- + -PLEX1.]
Telephony.
A. adjective. Of a system etc.: such that four messages can be sent over one wire at the same time. L19.
b. verb trans. Make (a circuit etc.) quadruplex. L19.