Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
circŭlātōrĭus, a, um, adj. [circulator], of a mountebank, quackish (post-Aug.): jactatio, Quint. 2, 4, 15: volubilitas, id. 10, 1, 8: praestigiae, Tert. Apol. 23.