HANGMAN SOLVER

adj

1. Having four components.
2. Of or relating to a system in telegraphy by which four messages (two in each direction) can be sent on one wire simultaneously.
3. Of or relating to an early videotape format with four magnetic record/reproduce heads mounted on a headwheel spinning transversely across the tape.

noun

1. A quadruplex system.

verb

1. (transitive) To make quadruplex.