The F diminished seventh chord (abbreviated "Fdim7 chord") is a four-note chord consisting of the notes F, A, C, and E. The chord is formed by adding a diminished seventh to a F diminished chord.

Name
F diminished seventh chord
Synonym
F fully diminished chord
Notes
F A C E
Intervals
1 3 5 7
Chord symbol
Fo7
Alternative symbols
Fdim7 Fdim Fo
Type
tetrad (four-note chord)

Fdim7 chord on piano

Fdim7 chord on guitar

Fdim7 chord on ukulele

Fdim7 chord on the staff