quadruplex

IPA: kwɑdrˈupɫɛks

(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.

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.

Examples of "quadruplex" in Sentences

At East 64th Street, Mr. Mottola's lavish quadruplex sits on one of the most exclusive-and expensive-blocks in Manhattan.
Configured as a quadruplex, the apartment includes three bedrooms, four and a half bathrooms, 13-foot ceilings, a media room, library and private terrace.
Note 32: The edition I will be using is that of 1624, Bibliotheca mundi Vincentii Burgundi … Speculum quadruplex, naturale, doctrinale, morale, historiale (Douai, Balthazar Bellerus).
The quadruplex was the tempting goal toward which Edison now constantly turned, and after more than a year's strenuous work he filed a number of applications for patents in the late summer of 1874.
While the quadruplex apartment was rumored to have sold for more than $20 million, city records show that in September, Mr. Mottola sold his 11,000-square-foot condo for $13.8 million-well below its original stratospheric asking price of $34 million.
Thus by combining instruments that respond only to variation in the strength of current from the distant station, with instruments that respond only to the change in the direction of current from the distant station, and by grouping a pair of these at each end of the line, the quadruplex is the result.