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English definition of “isthmus”

isthmus

noun [C] uk   /ˈɪsθ.məs/ /ˈɪs-/ specialized us  

isthmus noun [C] (LAND)

geography a narrow piece of land with water on each side that joins two larger areas of land: the Isthmus of PanamaPromontories and peninsulas

isthmus noun [C] (IN BODY)

medical a narrow connection between two organ parts or structures in the bodySubstances and structures in the body
(Definition of isthmus from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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