Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Urbĭus (Orbĭus, Fest. p. 182 Müll.) clivus, in Rome on the Esquiline Hill, Liv. 1, 48, 6; Sol. 1, § 25; cf. Becker, Antiq. 1, p. 525; and Müll. ad Fest. l. l.