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quad (6)
quadr-
quadra-
quadragenarian
Quadragesima
quadragesimal
quadrangle
quadrant
quadraphonic
quadraplex
quadrat
quadrate
quadratic
quadratic equation
quadratics
quadrature
quadrennia
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quadraphonic
quad·ra·phon·ic [ kwòddrə fónnik ] or quad·ri·phon·ic [ kwòddrə fónnik ] or quad·ro·phon·ic [ kwòddrə fónnik ]


adjective 
Definition:
 
using four-channel sound system: using a four-channel system to record and reproduce sound. The four separate signals may be fed to individual loudspeakers placed in the corners of a room.

quad·ra·phon·ics noun
qua·draph·o·ny [ kwo dróffənee ] noun
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