English Dictionary

diminished fifth

noun

(music) A type of tritone in musical composition comprising six semitones. It spans five diatonic scale degrees like a perfect fifth but narrower by a semitone. The number of diatonic degrees it spans is what distinguishes it from an augmented fourth.

The diminished fifth is a dissonant interval in music.

意味（1）

(music) A type of tritone in musical composition comprising six semitones. It spans five diatonic scale degrees like a perfect fifth but narrower by a semitone. The number of diatonic degrees it spans is what distinguishes it from an augmented fourth.

C - G is a perfect fifth, C - G♭ is a diminished fifth, and C - G# is an augmented fifth.