\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).