Pronunciation: (dOO'pleks, dyOO'-),[key] —n. 1. See duplex apartment. 2. See duplex house. 3. paper or cardboard having different colors, finishes, or stocks on opposite sides.
4. Print. a. a method of reproducing an illustration using two halftone plates, one black and the other in a color.
b. a printing press equipped to print both sides of a sheet in one pass.
5. Genetics.a double-stranded region of DNA.
—adj. 1. having two parts; double; twofold.
2. (of a machine) having two identical working units, operating together or independently, in a single framework or assembly.
3. pertaining to or noting a telecommunications system, as most telephone systems, permitting the simultaneous transmission of two messages in opposite directions over one channel.
—v.t. to make duplex; make or change into a duplex: Many owners are duplexing their old houses for extra income.