The C-sharp diminished chord (abbreviated "C#dim chord") is a triad consisting of the notes C, E, and G. The chord is formed by lowering the fifth of a C-sharp minor chord a half step.

Name
C-sharp diminished chord
Synonym
C-sharp diminished triad
Notes
C E G
Intervals
1 3 5
Chord symbol
Co
Alternative symbols
Cdim Cm(b5) Cmb5
Type
triad (three-note chord)

C#dim chord on piano

C#dim chord on guitar

C#dim chord on ukulele

C#dim chord on the staff