D9 chord
The D dominant ninth chord (abbreviated "D9 chord") is a five-note chord consisting of the notes D, F♯, A, C, and E. The chord is formed by adding a major ninth to a D dominant seventh chord.
In practice, the fifth (A) is sometimes omitted from the D9 chord because it's not always possible to play all notes simultaneously.
Name
D dominant ninth chord
Notes
D F♯ A C E
Intervals
1 3 5 ♭7 9
Chord symbol
D9
Type
pentad (five-note chord)