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.

Narbo, ōnis, m., and (late Lat.) Nar-bōna, ae, f., also with the appellation Marcius (after the consul Q. Marcius Rex, who led a colony thither A. U. C. 636), a city in Gaul, from which Gallia Narbonensis takes its name, the mod. Narbonne.
Form Narbo, Mela, 2, 5, 2; 6; Plin. 3, 4, 5, § 32; Cic. Font. 1, 3; 16, 36; Vell. 1, 15, 5; 2, 8, 1.
Form Narbona, Capitol. Max. et Balb. 5, 8; Eutr. 4, 23; Inscr. Orell. 218.
Hence,

  1. A. Narbōnensis, e, adj., of or belonging to Narbo, Narbonian: colonia, Cic. Brut. 43, 160; id. Clu. 51, 140: coloni Narbonenses, Cic. Font. 2, 14: Gallia, the province of Gaul beyond the Alps, Mela, 2, 5, 1; Plin. 4, 17, 31, § 105.
  2. B. Narbōnĭcus, a, um, adj., of or belonging to Narbo or to Narbonian Gaul, Narbonian: vitis, Plin. 14, 3, 4, § 43.