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tetrachord: Meaning and Definition of

tet•ra•chord

Pronunciation: (te'tru-kôrd"), [key]
— n. Music.
  1. a diatonic series of four tones, the first and last separated by a perfect fourth.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
tetrachloromethane tetracid
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