Dionysia
plural noun
Di·o·ny·sia ˌdī-ə-ˈni-zhē-ə 
-ˈnē-
-ˈnē- -shē-,
-zē-,
-sē-
: ancient Greek festival observances held in seasonal cycles in honor of Dionysus
especially : such observances marked by dramatic performances
Word History
Etymology
Latin, from Greek, from neuter plural of dionysios of Dionysus, from Dionysos
First Known Use
1812, in the meaning defined above