isthmus [is-muh s] Word Origin noun, plural isth·mus·es, isth·mi [is-mahy] /ˈɪs maɪ/.
- a narrow strip of land, bordered on both sides by water, connecting two larger bodies of land.
- Anatomy, Zoology. a connecting, usually narrow, part, organ, or passage, especially when joining structures or cavities larger than itself.
- Ichthyology. the narrow fleshy area between the sides of the lower jaw of a fish.
Origin of isthmus 1545–55; Latin Greek isthmós neck (of land)Related formsisth·moid, adjective Related Words for isthmi collar, strait, cape, cervix, scruff, nape, isthmus British Dictionary definitions for isthmi isthmus noun plural -muses or -mi (-maɪ)
- a narrow strip of land connecting two relatively large land areas
- a narrow band of tissue connecting two larger parts of a structure
- a narrow passage connecting two cavities
Derived Formsisthmoid, adjectiveWord Origin for isthmus C16: from Latin, from Greek isthmos Word Origin and History for isthmi isthmus n.
1550s, from Latin isthmus, from Greek isthmos “narrow passage, narrow neck of land,” especially that of Corinth, of unknown origin, perhaps from eimi “to go” + suffix -thmo (cf. ithma “a step, movement”).
isthmi in Medicine isthmus [ĭs′məs] n. pl. isth•mus•es
- A constriction or narrow passage connecting two larger parts of an organ or other anatomical structure.
isthmi in Science isthmus [ĭs′məs] Plural isthmuses isthmi (ĭs′mī′)
- A narrow strip of land connecting two larger masses of land.
isthmi in Culture isthmus [(is-muhs)]
A narrow strip of land that connects two larger bodies of land and has water on both sides.