B7(b9) chord
The B dominant minor ninth chord (abbreviated "B7(b9) chord") is a five-note chord consisting of the notes B, D♯, F♯, A, and C. The chord is formed by adding a major ninth to a B dominant seventh chord.
In practice, the fifth (F♯) is often omitted from the B7(b9) chord because it's not always possible to play all notes simultaneously.
Name
B dominant minor ninth chord
Notes
B D♯ F♯ A C
Intervals
1 3 5 ♭7 ♭9
Chord symbol
B7(b9)
Alternative symbol
B7b9
Type
pentad (five-note chord)