Lewis & Short

2. Dŭrĭus, ii, m. (Dūrĭa, ae, m., Claud. in Laud. Ser. Reg. 72), one of the principal rivers of Spain, now the Douro, Mel. 3, 1, 7 sq.; Plin. 4, 20, 34, § 112 sq.; Sil. 1, 234 al.