Augmented-fourth Definition

noun

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

E.g. C - F is a perfect fourth, C - F# is an augmented fourth, and C - F♭ is a diminished fourth.
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Other Word Forms of Augmented-fourth

Noun

Singular:
augmented-fourth
Plural:
augmented-fourths

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HTHRTH

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augmented-fourth

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