isthmus

play
noun isth·mus \ˈi-sməs\

Definition of isthmus

  1. 1 :  a narrow strip of land connecting two larger land areas

  2. 2 :  a narrow anatomical part or passage connecting two larger structures or cavities

Origin and Etymology of isthmus

Latin, from Greek isthmos


First Known Use: 1555


ISTHMUS Defined for English Language Learners

isthmus

play
noun isth·mus \ˈi-sməs\

Definition of isthmus for English Language Learners

  • : a narrow area of land that connects two larger land areas


ISTHMUS Defined for Kids

isthmus

play
noun isth·mus \ˈi-sməs\

Definition of isthmus for Students

  1. :  a narrow strip of land separating two bodies of water and connecting two larger areas of land


Medical Dictionary

isthmus

play
noun isth·mus \ˈis-məs\

Medical Definition of isthmus

  1. :  a contracted anatomical part or passage connecting two larger structures or cavities: asa:  an embryonic constriction separating the midbrain from the hindbrainb:  the lower portion of the uterine corpus



Seen and Heard

What made you want to look up isthmus? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

a small amount

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

  • winning-words-from-the-national-spelling-bee-logo
  • Which is the correct spelling of the winning word from 1988?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Bee Cubed

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!