Lewis & Short

Tīcīnus (scanned Tĭcīnus, Sid. Carm. 7, 552), i, m., the river Ticinus, in Gallia Cisalpina, celebrated for the victory of Hannibal over the Romans, now Ticino, Plin. 2, 103, 106, § 224; 3, 16, 20, § 118; Liv. 5, 34, 9; 21, 39, 10; 21, 45, 1; Sil. 4, 81 sq.; 6, 706; 7, 31; Claud. Cons. Hon. 6, 195; Flor. 2, 6, 10.
Hence,

  1. A. Tīcīnus, a, um, adj., of or belonging to the Ticinus, Ticinian: fluenta, Sil. 12, 548.
  2. B. Tīcī-nensis, e, adj., Ticinian: campi, lying on the Ticinus, Aur. Vict. Epit. 35.