Zōrŏastres, is, m., Zoroaster, a lawgiver of the Medes, Just. 1, 1, 9; Plin. 30, 1, 2, § 3; App. Mag. p. 291.
Hence, Zōrŏ-astrēus, a, um, adj., of or belonging to Zoroaster, Zoroastrian: susurri, i. e. magical, Prud. Apoth. 494 (where Zŏr-, by solecism).