perfect fourth
English
    
    Etymology
    
The word perfect refers to the fact that so-called perfect intervals are neither major nor minor.
Noun
    
perfect fourth (plural perfect fourths)
- A musical interval spanning four degrees of the diatonic scale. In the Western twelve-semitone system, it consists of five standard semitones.
- The perfect fourth has a pitch ratio close to 4:3.
 
Synonyms
    
- P4
Related terms
    
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