Guidonian

adjective

Gui·​do·​ni·​an

gwēˈdōnēən

: 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

Word History

Etymology

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

First Known Use

1721, in the meaning defined above

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