Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
1. cūrĭo, ōnis, m. [curia].
2. Cūrĭo, ōnis, m., a surname in the gens Scribonia; v. Scribonius; hence, Cū-rĭōnĭānus, a, um, adj., of or pertaining to Curio, Auct. B. Afr. 52 fin.
* 3. cūrĭo, ōnis, m. adj. [cura] (a humorously-formed word, corresp. with curiosus), wasted by sorrow, lean, emaciated: agnus, Plaut. Aul. 3, 6, 27 sq. (v. the passage in connection); cf. Paul. ex Fest. p. 60, 3 Müll.