enneachord

noun4

1. •
   A musical interval of nine notes.

   • These dynamical systems "pluck" the seventh chords out of the all-combinatorial enneachord in sc 9-12 (9 through 12). — 2008
2. •
   A chord played with nine notes.

   • If we agree that the system consisted of 2 consecutive descending heptachords, or two conjunct enneachords, then we have theory applied to a specific instrument rather than pure theory. — 2005
3. •
   An ancient Greek nine-stringed musical instrument.
4. •
   A mystical chord or combination of nine entities that characterizes the music of the spheres.

   • Nature thus arranges the various enneachords in the world so that all are in tune with the celestial enneachord; and when one is set going, all the rest will resonate. — 1987