(organic chemistry) Any of several organic compounds that can be viewed as derivatives of an anthraquinone through replacement of one hydrogen atom by a hydroxyl group.
quadrioxalate
quadruplex
quadruplex
adj
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.
