Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
1. Mĕnaeus, a, um, adj., of or belonging to the city of Menæ, in Sicily: comitata Menaeis (viris), Sil. 14, 266.
† 2. mēnaeus, i, m., = μηναῖος, monthly; subst. (sc. circulus), a monthly circle (al. manacus), Vitr. 9, 8.