Lewis Short
(adjective) : Arīus (Arr-), i, m., = Ἀρεῖος or Ἄριος
* A renowned heretic, also Ārĭus, Prud. Psych. 794.—Hence, Arīānus, a, um, , pertaining to Arius, Arian, Hier. adv. Lucif. 7.—Arīāni, ōrum, m., the followers of Arius, the Arians, Hier. adv. Lucif. 7; Aug. Haeres. 49.
Charlton T. Lewis, Charles Short, A Latin Dictionary
Lewis Short
Arīus (noun M) : Ἄρειος or Ἄριος
* A river in Aria, now Heri, Plin. 6, 23, 25, § 93; in Amm. 23 fin. Arias.
Charlton T. Lewis, Charles Short, A Latin Dictionary