The B-flat diminished chord (abbreviated "Bbdim chord") is a triad consisting of the notes B, D, and F. The chord is formed by lowering the fifth of a B-flat minor chord a half step.

Name
B-flat diminished chord
Synonym
B-flat diminished triad
Notes
B D F
Intervals
1 3 5
Chord symbol
Bo
Alternative symbols
Bdim Bm(b5) Bmb5
Type
Triad (three-note chord)

Bbdim chord on piano

Bbdim chord on guitar

Bbdim chord on ukulele

Bbdim chord on the staff