heptachord

== English == === Etymology === From Ancient Greek ἑπτάχορδος (heptákhordos, “seven-stringed”), from ἑπτά (heptá, “seven”) + χορδή (khordḗ, “chord”). Compare French heptacorde. === Noun === heptachord (plural heptachords) (music) A system of seven sounds. (music) A lyre with seven chords. (poetry) A composition sung to the sound of seven chords or tones. === References === “heptachord”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.