Ab minor ninth chord
Abm9 chord for piano with keyboard diagram.
Explanation: The Ab minor ninth is a five note chord. For practical reasons the chord is normally played with omitted notes and/or inverted. The chord is often abbreviated as Abm9.
Theory: The Abm9 chord is constructed with a root, a minor third, a perfect fifth, a minor seventh and a major ninth.
Notes: Ab - B - Eb - Gb - Bb