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Definition of Heptachord
1. n. A system of seven sounds.
Definition of Heptachord
1. Noun. (music) A system of seven sounds. ¹
2. Noun. (music) A lyre with seven chords. ¹
3. Noun. (poetry) A composition sung to the sound of seven chords or tones. ¹
¹ Source: wiktionary.com