Lewis & Short

Brĭgantĭum, ii, f., or Brĭgantĭa, ae, f.

  1. I. A town in Rhœtia, now Bregenz, Amm. 15, 4, 1 and 3; Itin. Anton.
    Hence, Brĭgantīnus, a, um, adj.: lacus, the lake of Constance, Plin. 9, 17, 29, § 63 (in Mel. 3, 2, 8, Lacus Venetus).
  2. II. The town of Briançon, in France, Amm. 15, 10, 7.