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diaschisma

noun di·a·schis·ma \ ˌdīəˈskizmə \

Definition of diaschisma

plural -s
1 : one of several minute intervals in ancient Greek music
2 : a small musical interval (such as that between C and D double flat in pure intonation) that together with the schisma comprises the syntonic comma

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Origin and Etymology of diaschisma

New Latin, from Greek diaschisma, from diaschizein to sever

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