Lewis & Short

pŏtămŏgēton or pŏtămŏgīton, ŏnis, f., = ποταμογείτων (a neighbor of the river), a water-plant, water-milfoil, pondweed, Plin. 26, 8, 33, § 50; 32, 5, 19, § 53. ‡† pŏtămŏphylăcĭa, ae, f., = ποταμόσ-φυλακή, a guarding of the river, Inscr. Murat. 1056, 4.