Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† lăgănum, i, n., = λάγανον, a kind of cake made of flour and oil, Hor. S. 1, 6, 115; Cels. 8, 7, § 23 al.: lagana azyma, Vulg. Exod. 29, 2; id. Num. 6, 15.