DICT.TW Dictionary Taiwan

 Isth·mi·an a.  Of or pertaining to an isthmus, especially to the Isthmus of Corinth, in Greece.
 Isthmian games Gr. Antiq., one of the four great national festivals of Greece, celebrated on the Isthmus of Corinth in the spring of every alternate year. They consisted of all kinds of athletic sports, wrestling, boxing, racing on foot and in chariots, and also contests in music and poetry. The prize was a garland of pine leaves.
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 Isthmian Games
      n : the ancient Panhellenic games held biennially on the Isthmus
          of Corinth in the first and third years of each Olympiad