isthmus

A narrow strip of land connecting two larger masses of land.

A narrow strip of tissue joining two larger organs or parts of an organ.

A narrow passage connecting two larger cavities.

In fishes, the lower part of the septum between the opposing gill-openings. It is supported and stiffened by the urohyal.

A narrow strip of land bordered by water and connecting two larger bodies of land, as two continents, a continent and a peninsula, or two parts of an island.

In botany and zoology, some connecting part or organ, especially when narrow or joining parts larger than itself.

The contracted passage from the cavity of the mouth into that of the pharynx.

A neck or narrow slip of land by which two continents are connected, or by which a peninsula is united to the mainland

See Fauces.