Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
grānĕus, a, um, adj. [granum], of corn, only as subst.: grānĕa, ae, f. (sc. puls), a sort of frumenty or pap made of pounded corn, Cato, R. R. 86; Hier. Paralip. 1, 23.