jejunum

play
noun je·ju·num \ji-ˈjü-nəm\

Definition of jejunum

plural

jejuna

play \ji-ˈjü-nə\
  1. :  the section of the small intestine that comprises the first two fifths beyond the duodenum and that is larger, thicker-walled, and more vascular and has more circular folds than the ileum

Origin and Etymology of jejunum

Middle English, from Medieval Latin, from neuter of Latin jejunus


Medical Dictionary

jejunum

play
noun je·ju·num \ji-ˈjü-nəm\

Medical Definition of jejunum

plural

jejuna

\-nə\play
  1. :  the section of the small intestine that comprises the first two fifths beyond the duodenum and that is larger, thicker-walled, and more vascular and has more circular folds and fewer Peyer's patches than the ileum

Illustration of jejunum


Learn More about jejunum


Seen and Heard

What made you want to look up jejunum? 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

the weight of a container

Get Word of the Day daily email!

Test Your Vocabulary

The Emoji Quiz

  • emoji-the-quiz
  • What phase of the moon is this: 🌖 ?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

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!