isth ‧ mus /ˈɪsməs/ BrE AmE noun [countable]
[ Date: 1500-1600 ; Language: Latin ; Origin: Greek isthmos ]
a narrow piece of land with water on both sides, that connects two larger areas of land:
the Isthmus of Panama
isth ‧ mus /ˈɪsməs/ BrE AmE noun [countable]
[ Date: 1500-1600 ; Language: Latin ; Origin: Greek isthmos ]
a narrow piece of land with water on both sides, that connects two larger areas of land:
the Isthmus of Panama
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012