Cătădūpa, ōrum, n., = Κατάδουπα,
the celebrated cataract of the Nile , near Syene , on the borders of Egypt (cf. cataracta), now Chellal , Cic. Rep. 6, 18, 19; Macr. Somn. Scip. 2, 4, § 14.— Cătădūpi , ōrum, m., those dwelling near , Plin. 5, 9, 10, § 54; 6, 29, 35, § 178; Amm. 22, 15, 2.