isthmian
C2Ածական/US /ˈɪsθmiən/ ˈĭsthmēən; UK /ˈɪsθmiən/ ˈĭsthmēən/
Of or pertaining to an isthmus, especially to the Isthmus of Corinth, in Isthmian games , one of the four great national festivals of Greece, celebrated on the Isthmus of Corinth in the spring of every alternate year.
