C#m7(b5) chord
The C-sharp half-diminished seventh chord (abbreviated "C#m7(b5) chord") is a four-note chord consisting of the notes C♯, E, G, and B. The chord is formed by lowering the fifth of a C-sharp minor seventh chord a half step.
Name
C-sharp half-diminished seventh chord
Synonyms
C-sharp half-diminished chord C-sharp minor seventh flat five chord
Notes
C♯ E G B
Intervals
1 ♭3 ♭5 ♭7
Chord symbol
C♯m7(b5)
Alternative symbols
C♯ø C♯ø7 C♯m7b5 C♯–7(b5) C♯mi7(b5) C♯min7(b5)
Type
Tetrad (four-note chord)