Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
mensālis, e, adj. [mensa], of or belonging to the table, table- (post-class.): argentum mensale, silver table-service, Vop. Tac. 10: vinum, Auct. ap. Vop. Aurel. 9, 6: citharae species mensalis, Diom. 479, 12.