A / Arsĭa
noun

Arsĭa

gen. Arsiae · gender masculine · decl. 1st
a small river of Istria; Arsa
a small river of Istria, which became the boundary between Italy and Illyricum under Augustus; the present Arsa, Plin. 3, 26, 29, § 150; Flor. 2, 5; cf. Mann. Thrace, p. 325.