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Noun
1. accidentalMusic
Wikipedia definition
2. Accidental (music)In music, an accidental is a note whose pitch is not a member of a scale or mode indicated by the most recently applied key signature. In musical notation, the symbols used to mark such notes, sharps (♯), flats (♭), and naturals (♮), may also be called accidentals.
Read “Accidental (music)” on English Wikipedia
Read “臨時記号” on Japanese Wikipedia
Read “Accidental (music)” on DBpedia

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