Menaion \Me*na"ion\ (m[-e]*n[=a]"y[o^]n), n.; pl. {Menaia} (-y[.a]). [NL., from Gr. mhnai^os monthly.] (Eccl.) A work of twelve volumes, each containing the offices in the Greek Church for a month; also, each volume of the same. --Shipley. [1913 Webster] Menild