The F diminished chord (abbreviated "Fdim chord") is a triad consisting of the notes F, A, and C. The chord is formed by lowering the fifth of a F minor chord a half step.

Name
F diminished chord
Synonym
F diminished triad
Notes
F A C
Intervals
1 3 5
Chord symbol
Fo
Alternative symbols
Fdim Fm(b5) Fmb5
Type
triad (three-note chord)

Fdim chord on piano

Fdim chord on guitar

Fdim chord on ukulele

Fdim chord on the staff