/ Dictionary / Index H hexachord: Meaning and Definition of Find definitions for: hex•a•chord Pronunciation: (hek'su-kôrd"), [key] — n. Music. a diatonic series of six tones having, in medieval music, a half step between the third and fourth tones and whole steps between the others. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hexachlorophene hexacosanoic acid Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language