Casīnum, i, n., a town of Latium, east of Aquinium, now ruins near S. Germano: its citadel the present Monte Casino, Varr. L. L. 7, § 29, p. 86 Bip.; id. R. R. 3, 4, 2; Plin. 3, 5, 9, § 63.

— Hence the adjj., Casīnas, ātis, of Casinum: ager, Cato, R. R. 136; Cic. Agr. 2, 25, 65: fundus, id. Phil. 2, 40, 103; and absol.: in Casinati or Casinate, in the region of Casinum, Varr. R. R. 2, 3, 11; Plin. 2, 103, 106, § 227.

— Casīnus, a, um, of Casinum: Nymphae, Sil. 12, 527 dub. (others, Casini Nymphae).