Text: The interval comprised by the first and last of any six notes in a diatonic scale. The sixth, like the third, of which it is the inversion, is an imperfect consonance. the term "sixth chord" is sometimes used in referring to the six-three chord. Collin's Music Encyclopedia, William Collins Sons, & Co., Ltd., London, 1959.

See Also: AUGMENTED SIXTH, CHORD, INTERVAL

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