isthmus
noun [ C ] specialized uk/ˈɪsθ.məs/ /ˈɪs.məs/ us/ˈɪsθ.məs/ /ˈɪs.məs/
(LAND)
geography 地峡
a narrow piece of land with water on each side that joins two larger areas of land
the Isthmus of Panama 巴拿马地峡
(IN BODY)
medical （身体）峡部
a narrow connection between two organ parts or structures in the body