Hep"ta*chord (?), n. [Gr.
"epta`xordos seven-stringed; "epta` seven +
xordh` chord: cf. F. heptacorde. See Seven,
and Chord.] 1. (Anc. Mus.)
(a) A system of seven sounds.
(b) A lyre with seven chords.
2. (Anc. Poet.) A composition sung to
the sound of seven chords or tones. Moore (Encyc. of
Music).