Lewis & Short

2. Argentĕus, a, um, adj., a standing epithet of a river in Gallia Narbonensis, now Argents: flumen Argenteum, Lepidus ap. Cic. Fam. 10, 34, 1: amnis Argenteus, Plin. 3, 4, 5, § 35; with a tēte du pont and castle: Pons Argenteus, Lepidus ap. Cic. Fam. 10, 34, B.