Mattĭăcus, a, um,
adj., of or belonging to Mattiacum (the mod. Wiesbaden ): Mattiaci fontes, the warm mineral springs of Wiesbaden , Plin. 31, 2, 17, § 20: aquae, Amm. 29, 4, 3: pilae, soap-balls for coloring the hair , Mart. 14, 27: ager, Tac. A. 11, 20. —In plur. subst. : Mattĭăci , ōrum, m., the inhabitants of Mattiacum , Tac. G. 29; id. H. 4, 37.