Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Histri (less correctly Istri), ōrum, m., the people of Istria, Istrians, a barbarous Illyrian tribe subdued by the Romans B. C. 177: principes Histrorum, Liv. 41, 11; Plin. 3, 19, 23, § 129: Histrorum gentem originem a Colchis ducere, Just. 32, 3, 13: per Histros Hister emittitur, Mel. 2, 3 fin.
Hence, Histria (Istria), ae, f., a country on the eastern shore of the Adriatic Sea, extending from Trieste to the Sinus Flanaticus: Histria ut peninsula excurrit, Plin. 3, 19, 23, § 129; Liv. 39, 55.
Derivv.
histrĭcus, a, um, adj. [hister, histrio], of or belonging to stage-players: imperator histricus, the manager, Plaut. Poen. prol. 4; cf. imperium, the management, id. ib. 44.
Istri (Histri), ōrum, m.,