Jisho

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Noun
1. perfect fifthMusic
Wikipedia definition
2. Perfect fifthIn classical music from Western culture, a fifth is a musical interval encompassing five staff positions (see Interval number for more details), and the perfect fifth (often abbreviated P5) is a fifth spanning seven semitones, or in meantone, four diatonic semitones and three chromatic semitones. For example, the interval from C to G is a perfect fifth, as the note G lies seven semitones above C, and there are five staff positions from C to G.
Read “Perfect fifth” on English Wikipedia
Read “完全五度” on Japanese Wikipedia
Read “Perfect fifth” on DBpedia

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