[isth.mi.an] n (1601) 1: a native or inhabitant of an isthmus
2. cap: a native or inhabitant of the Isthmus of Panama
[2]isthmian adj (1603): of, relating to, or situated in or near an isthmus: as a often cap: of or relating to the Isthmus of Corinth in Greece or the games held there in ancient times b often cap: of or relating to the Isthmus of Panama connecting the No. American and So. American continents