[ ahy-suh-rith-uh m ]
/ ˈaɪ səˌrɪð əm /
a structural feature characteristic of the Ars Nova motet, consisting of a single rhythmic phrase pattern repeated, usually in the tenor, throughout the composition.
Related formsi·so·rhyth·mic, adjectivei·so·rhyth·mi·cal·ly, adverb
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