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.