Lewis & Short

Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.

Osca, ae, f., a town in Hispania Tarraconensis, now Huesca, in Aragon, Vell. 2, 30, 1; Flor. 3, 22, 9.
Hence, Oscensis, e, adj., of or belonging to Osca, a town of Spain, Oscan: ager, Varr. R. R. 1, 57: argentum, with the Oscan stamp, Liv. 34, 10.
In plur.: Oscenses, ĭum, m., the inhabitants of Osca, the Oscans, Caes. B. C. 1, 60; Plin. 3, 3, 4, § 24.

Osci, ōrum, m.,

  1. I. the Oscans, a primitive people of Campania; in more ancient times called also Opici and Opsci (Obsci), Verg. A. 7, 730; cf. Paul. ex Fest. p. 198 Müll.
    Hence,
  2. II. Oscus, a, um, adj., Oscan: ludi, Cic. Fam. 7, 1: lingua, Varr. L. L. 7, § 28 Müll.; Verg. A. 7, 730; Liv. 10, 20, 8: ludicrum, Tac. A. 4, 14.
    Adv.: Oscē, in Oscan: qui Osce et Volsce fabulantur: nam Latine nesciunt, Titin. ap. Fest. p. 198 Müll.: dicere aliquid, Varr. L. L. 5, § 131 Müll.: scire, Gell. 17, 17, 1.