|—n , pl -muses, -mi|
|1.||a narrow strip of land connecting two relatively large land areas|
|a. a narrow band of tissue connecting two larger parts of a structure|
|b. a narrow passage connecting two cavities|
|[C16: from Latin, from Greek isthmos]|
isthmus isth·mus (ĭs'məs)
n. pl. isth·mus·es or isth·mi (-mī')
A constriction or narrow passage connecting two larger parts of an organ or other anatomical structure.
|isthmus (ĭs'məs) Pronunciation Key
Plural isthmuses or isthmi (ĭs'mī')
A narrow strip of land connecting two larger masses of land.
A narrow strip of land that connects two larger bodies of land and has water on both sides.