Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
pransōrĭus, a, um, adj. [pransor], of or belonging to breakfast or luncheon (postAug.): candelabrum pransorium, for humile, fit to breakfast by (when a lamp was not needed), Quint. 6, 3, 99.