Fdim
Diminished · F – G♯ – B
- FR
- G♯m3
- B♭5
Guitar voicings
Piano
- Root
- Third / sus
- Fifth
- Sixth / seventh
- Extension
About the Fdim chord
The Fdim chord (Diminished) is built from F (the root), G♯ (a minor third) and B (a diminished fifth). Diminished triads are tense and unstable, often used as passing chords between stronger harmonies.