chorion

noun cho·ri·on \ ˈkȯr-ē-ˌän \

Definition of chorion

: the highly vascular outer embryonic membrane of reptiles, birds, and mammals that in placental mammals is associated with the allantois in the formation of the placenta

Origin and Etymology of chorion

New Latin, from Greek, afterbirth


Medical Dictionary

chorion

noun cho·ri·on \ ˈkōr-ē-ˌän, ˈkȯr- \

medical Definition of chorion

: the highly vascular outer embryonic membrane that is associated with the allantois in the formation of the placenta


Seen and Heard

What made you want to look up chorion? 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

subject to rapid or unexpected change

Get Word of the Day daily email!

Test Your Vocabulary

The Eponym Quiz

  • rubens-painting
  • Which is the best synonym of bowdlerize?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Citation

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!