panhellenic

/ˌpænhəˈlɛnɪk/
adjective
  1. Relating to all Greek people or all Greek institutions, especially in the context of fraternities and sororities in the United States.
    • The Panhellenic Council oversees all sororities on campus.
    • Ancient Greece had panhellenic games that brought together athletes from every city-state.
    • They attended a panhellenic recruitment event to learn about joining a fraternity.