Lewis & Short

Bȳzācĭum, ii, n., = Βυσσᾶτις,

  1. I. a province in Africa Propria, between the river Triton and the Lesser Syrtis, Varr. R. R. 1, 44, 2; Plin. 5, 4, 3, § 24; 17, 5, 3, § 41.
  2. II. Derivv.
    1. A. Bȳzācēnus, a, um, adj., of Byzacium: provincia, Cod. Just. 1, 27, 2; Cod. Th. 1, 27, 2.
      As subst.: Bȳzācēni, ōrum, m., the inhabitants of Byzacium, Cod. Th. 11, 1, 29.
    2. B. Bȳzācĭus, a, um, the same: rura, Sil. 9, 204.