| Basic: |
| An isthmus is a type of physical path, natural thing, and land topographical feature. |
| Documentation: |
| Comment: A specialization of LandTopographicalFeature . Each instance of #$Isthmus is a narrow strip of land that has bodies of water on either side, and which connects two larger bodies of land. |
| Miscellaneous: |
| No isthmus is a landmass. Isthmus Of Panama is an isthmus. |