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Definition of isthmus noun from the Oxford Advanced Learner's Dictionary

isthmus

noun

/ˈɪsməs/

/ˈɪsməs/

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a narrow piece of land, with water on each side, that joins two larger pieces of landTopics Geographyc2
Word Originmid 16th cent.: via Latin from Greek isthmos.

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See isthmus in the Oxford Advanced American Dictionary

Check pronunciation: isthmus

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