Symposia :: Symposion (n.) A drinking together; a symposium.
Symposiac :: Sympodium (n.) An axis or stem produced by dichotomous branching in which one of the branches is regularly developed at the expense of the other, as in the grapevine..
Symposiac :: Symposiac (a.) Of or pertaining to compotations and merrymaking; happening where company is drinking together; as, symposiac meetings..
Symposiarch :: Symposiac (n.) A conference or conversation of philosophers at a banquet; hence, any similar gathering..