quadraphonic

[ kwod-ruh-fon-ik ]

adjective

1. of, noting, or pertaining to the recording and reproduction of sound over four separate transmission or direct reproduction channels instead of the customary two of the stereo system:

   a quadraphonic recording.

Word History and Origins

Origin of quadraphonic¹

1965–70; quadra-, variant of quadri- + -phonic, as in stereophonic