Cm9 chord
The C minor ninth chord (abbreviated "Cm9 chord") is a five-note chord consisting of the notes C, E♭, G, B♭, and D. The chord is formed by adding a major ninth to a C minor seventh chord.
In practice, the fifth (G) is sometimes omitted from the Cm9 chord because it's not always possible to play all notes simultaneously.
Name
C minor ninth chord
Notes
C E♭ G B♭ D
Intervals
1 ♭3 5 ♭7 9
Chord symbol
Cm9
Alternative symbols
C–9 Cmi9 Cmin9
Type
Pentad (five-note chord)