Lewis & Short

Sĕnŏnes or Sēnōnes, um, m., = Σένονες or Σήνωνες.

  1. I. A people in Gallia Lugdunensis, whose chief city was Agendicum, now Sens, Caes. B. G. 5, 54; 5, 56; 6, 2 sq.; 6, 44; 7, 4 al.; Plin. 4, 18, 32, § 107; Juv. 8, 234; Sil. 4, 160; Eutr. 10, 7.
    In sing.: Sĕno, ŏnis, m., one of the Senones: Drappeten Senonem, Hirt. B. G. 8, 30.
  2. II. A people in Gallia Cisalpina, sprung from the above, Liv. 5, 35; 10, 26; Plin. 3, 15, 20, § 116.
    Hence, Sĕnŏnĭcus, a, um, adj., of or belonging to the Senones: bellum, Gell. 17, 21, 21.