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.

Olbĭŏpŏlis, is, f., a city in Sarmatia, Plin. 4, 12, 26, § 82.
Hence. Olbĭŏpŏlī-ta, ae, adj., of or belonging to Olbiopolis or Olbia, in Sarmatia; only plur. subst., the inhabitants of that place, Capitol. Anton. 9.