isthmus

 
Pronunciation: /ˈɪsθməs, ˈɪstməs, ˈɪsməs/

noun (plural isthmuses)

  • 1a narrow strip of land with sea on either side, forming a link between two larger areas of land.
  • 2 (plural isthmi) Anatomy a narrow organ, passage, or piece of tissue connecting two larger parts.

Origin:

mid 16th century: via Latin from Greek isthmos

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