- quadruple run,
- quadruple time,
Origin of quadruplex
Examples from the Web for quadruplex
I had paid for all the experiments on the quadruplex and exhausted the money, and I was again in straits.
A general knowledge of the principles of quadruplex and multiplex working.The British State Telegraphs|Hugo Richard Meyer
The first quadruplex system was invented by Edison in 1874, and in four years it saved more than half a million dollars.
Quadruplex telegraph, sending four messages over one wire at the same time—Edison, 1873.
For his quadruplex system, Mr. Edison utilized this fact in the construction of a rheostat or resistance box.
Word Origin for quadruplex
1875, in reference to telegraph systems in which four messages can be wired simultaneously, from quadru- + plex. In classical Latin, quadruplex meant "fourfold, quadruple," as a noun, "a fourfold amount."