Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
carcĕrālis, e, adj. [carcer], of or pertaining to a prison (post-class.): caecitas, Prud. στεφ. 5, 269: stipes, id. 5, 551; Cod. Th. 9, 3, 6.