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Usul may refer to:
- Usul al-fiqh, a principle of Islamic jurisprudence
- Usul al-Din, the Shi'a Roots of Religion
- Usul (music), a rhythmic pattern used in Ottoman classical music.
- Usul, the secret tribal name of Paul Atreides in Frank Herbert's Dune novels
|This disambiguation page lists articles associated with the title Usul.
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