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.

Tergeste, is, n., the northernmost town on the coast of Istria, the mod. Trieste, Mel. 2, 4, 3; Plin. 3, 18, 22, § 127; Vell. 2, 110, 4.
Called also Tergestum, Mel. 2, 3, 13.
Hence, Tergestīnus, a, um, adj., of or belonging to Tergeste, Tergestine. sinus, the mod. Golfo di Trieste, Plin. 3, 18, 22, § 127.
Plur subst. Tergestīni, ōrum, m., the inhabitants of Tergeste, the Terges tines, Hirt B G 8, 24.