WordReference Random House Unabridged Dictionary of American English © 2026
i•so•rhythm
(ī′sə riᵺ′əm),USA pronunciation n. [Music.]
i′so•rhyth′mic, adj.
i′so•rhyth′mi•cal•ly, adv.
- Music and Dancea structural feature characteristic of the Ars Nova motet, consisting of a single rhythmic phrase pattern repeated, usually in the tenor, throughout the composition.
- iso- + rhythm 1950–55
i′so•rhyth′mi•cal•ly, adv.