Arius was a Christian priest in Alexandria, Egypt in the early fourth century.
Arius may also refer to:
- Arius (genus), a genus of catfishes
- Arius Didymus, a citizen of Alexandria
- Hari River, a river known in Latin as the Arius
- Arius, a long-running line of digital pianos created by the Yamaha
|This disambiguation page lists articles associated with the title Arius.
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