Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
lŭcuns, untis, f. [root lic or luc, crooked, as in obliquus, luxus; Gr. λοξός; cf.: licinus, limus], a kind of pastry, Varr. ap. Non. 131, 24; cf.: lucuntem genus operis pistorii, Paul. ex Fest. p. 119 Müll.