Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
lŭcuncŭlus, i, m. dim. [lucuns], a kind of pastry, Afran. ap. Non. 131, 28: molles caseoli lucunculique, Stat. S. 1, 6, 17; App. M. 10, p. 245, 1; Petr. 66: lucunculus, τηγανίτης, Gloss. Philox.