isthmus plural
isth·mus
The plural form of isthmus is isthmi
I iDefinitions
- noun plural isthmus a narrow strip of land, bordered on both sides by water, connecting two larger bodies of land. 1
- noun plural isthmus Anatomy, Zoology. a connecting, usually narrow, part, organ, or passage, especially when joining structures or cavities larger than itself. 1
- noun plural isthmus Ichthyology. the narrow fleshy area between the sides of the lower jaw of a fish. 1