Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
* mendācĭuncŭlum, i, n. dim. [mendacium], a little lie, trifling untruth, fib: quod tamen est mendaciunculis aspergendum (al. mendaciolis), Cic. de Or. 2, 59, 241 Orell. N. cr.