Lewis & Short

Clănĭus, ii, m., a river in Campania, destructive by frequently overflowing the country around, especially the town of Acerrœ (v. Acerrae), now Lagno, Verg. G. 2, 225 Heyne; Sil. 8, 537; also called Glănis, Plin. 3, 5, 9, § 53 sq.