from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A narrow strip of land connecting two larger masses of land.
- n. Anatomy A narrow strip of tissue joining two larger organs or parts of an organ.
- n. Anatomy A narrow passage connecting two larger cavities.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A narrow strip of land, bordered on both sides by water, and connecting two larger landmasses.
- n. Any such narrow part connecting two larger structures.
from the GNU version of the Collaborative International Dictionary of English
- n. A neck or narrow slip of land by which two continents are connected, or by which a peninsula is united to the mainland
from The Century Dictionary and Cyclopedia
- n. 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.
- n. In botany and zoology, some connecting part or organ, especially when narrow or joining parts larger than itself.
- n. The contracted passage from the cavity of the mouth into that of the pharynx.
- n. In fishes, the lower part of the septum between the opposing gill-openings. It is supported and stiffened by the urohyal.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a cord-like tissue connecting two larger parts of an anatomical structure
- n. a relatively narrow strip of land (with water on both sides) connecting two larger land areas
Latin, from Greek isthmos.(American Heritage® Dictionary of the English Language, Fourth Edition)
Via Latin isthmus, from Ancient Greek ἰσθμός (isthmos, "neck"). Cognate to Old Norse eið ("isthmus"). (Wiktionary)