First Known Use: 1555
Dictionary
isthmus
noun isth·mus \ˈis-məs\
: a narrow area of land that connects two larger land areas
Full Definition of ISTHMUS
1
: a narrow strip of land connecting two larger land areas
2
: a narrow anatomical part or passage connecting two larger structures or cavities
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Origin of ISTHMUS
Latin, from Greek isthmos
Other Geology Terms
Rhymes with ISTHMUS
ISTHMUS Defined for Kids
isthmus
noun isth·mus \ˈi-sməs\
Definition of ISTHMUS for Kids
: a narrow strip of land separating two bodies of water and connecting two larger areas of land
Medical Dictionary
isthmus
noun isth·mus \ˈis-məs\
Medical Definition of ISTHMUS
: a contracted anatomical part or passage connecting two larger structures or cavities: as a : an embryonic constriction separating the midbrain from the hindbrain b : the lower portion of the uterine corpus
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