isthmus

thumb|upright|The sandy isthmus or tombolo "The Neck" connects North and South [[Bruny Island in Tasmania, Australia.]] An isthmus ( ; : isthmuses or isthmi ; from Ancient Greek ) is a narrow piece of land connecting two larger areas across an expanse of water by which they are otherwise separated. A tombolo is an isthmus that consists of a spit or bar, and a strait is the sea counterpart of an isthmus, a narrow stretch of sea between two landmasses that connects two larger bodies of water.

==Isthmus vs land bridge vs peninsula== thumb|Aerial perspective of the isthmus of Bruny Island