Heptachord

[heptәkɒ:d]

(n.) A system of seven sounds.

(n.) A lyre with seven chords.

(n.) A composition sung to the sound of seven chords or tones.

Checker: Mae

n. in Greek music a diatonic series of seven tones containing five whole steps and one half-step: an instrument with seven strings.

Inputed by Fidel