Megalesia

[ meg-uh-lee-zhuh, -shuh, -see-uh ]
/ ˌmɛg əˈli ʒə, -ʃə, -si ə /

noun (sometimes used with a plural verb)

an ancient Roman festival in honor of the Magna Mater.
Also called Megalesian Games.

Origin of Megalesia

< Latin, short for megalēsia ( lūdī) Megalesian (games), derivative of Megalē the great (< Gk), surname of the Magna Mater