[ˈɪsməs], (Noun)

Definitions:
- a narrow strip of land with sea on either side, forming a link between two larger areas of land
(e.g: the isthmus was an important overland route between the Atlantic and Pacific)

- a narrow organ, passage, or piece of tissue connecting two larger parts
(e.g: the isthmus connects both right and left lobes of the gland)


Phrases:

Origin:
mid 16th century: via Latin from Greek isthmos