Lewis & Short

hydrŏmĕli (-mel), ĭtis, n., = ὑδρόμελι, a beverage made of honey and water, honey-water, mead, hydromel, Plin. 14, 17, 20, § 113; 22, 13, 15, § 34; 27, 5, 20, § 37; Pall. Jul. 7; Isid. Or. 20, 3 (al. hydromelum). form hydromel, -llis, n., Theod. Prisc. 2, 2; 2, 17; Plin. Val. 1, 32.