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diatonicism

noun di·a·ton·i·cism \ ˌdīəˈtänəˌsizəm \
variants: or less commonly diatonism \ˈdīəˌtäˌnizəm, dīˈatəˌn-\
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Definition of diatonicism

plural -s
1 : the quality or state of being diatonic
2 : the use of diatonic harmony —contrasted with chromaticism

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