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.

Vĕnŭsĭa, ae, f., a town on the borders of Apulia and Lucania, the birthplace of the poet Horace, now Venosa, Plin. 3, 11, 16, § 104; Cic. Att. 5, 5, 1; 16, 5, 3; Liv. 22, 49; 22, 54; Vell. 1, 14, 6.
Hence, Vĕnŭsīnus, a, um, adj., of or belonging to Venusia, Venusian: silvae, Hor. C. 1, 28, 26: colonus, i. e. Horace, id. S. 2, 1, 35: lucerna, i. e. the poetry of Horace, Juv. 1, 51.
Subst.: Vĕ-nŭsīni, ōrum, m., the inhabitants of Venusia, the Venusians, Liv. 22, 54; 27, 10.