Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
pānĭcĕus, a, um, adj. [panis], made of bread: mensae, i. e. huge loaves, Serv. Verg. A. 3, 257.
As subst.: Pānĭcĕus, i, m., an inhabitant of Breadville: opus est Paniceis, milites panicei (a comic expression), Plaut. Capt. 1, 2, 59.