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Guidonian

adjective
Gui·​do·​ni·​an | \ gwēˈdōnēən\

Definition of Guidonian

: of or relating to the theories of medieval music theorist Guido d'Arezzo especially : relating to his system of solfège and theory of movable hexachords

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First Known Use of Guidonian

1721, in the meaning defined above

History and Etymology for Guidonian

Guido d'Arezzo (also called Fra Guittone) †about 1050 Benedictine monk and musical reformer + English -ian

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The first known use of Guidonian was in 1721

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