Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
uncĭālis, e, adj. [uncia], of or belonging to a twelfth part, amounting to a twelfth part: asses, i. e. weighing an ounce, Plin. 33, 3, 13, § 45; so, uva, id. 14, 3, 4, § 42: altitudo, of an inch, id. 18, 16, 43, § 146; so, litterae, Hier. prol. in Job fin.