2. Fūcĭnus, i, m., a lake of Latium, in the territory of the Marsi, now Lago Fucino or Lago di Celano, Verg. A. 7, 759; Mart. de Spect. 28, 11; more freq. called Lacus Fucinus, Liv. 4, 57, 7; Plin. 3, 12, 17, § 108; 36, 15, 24, § 124; Suet. Caes. 44; id. Claud. 20 sq.; Tac. A. 12, 56.