jejunum

noun
je·​ju·​num | \ ji-ˈjü-nəm How to pronounce jejunum (audio) \
plural jejuna\ ji-​ˈjü-​nə How to pronounce jejunum (audio) \

Definition of jejunum

: 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

Examples of jejunum in a Sentence

Recent Examples on the Web The primary function of the jejunum is to absorb water and nutrients from food—specifically, sugars, amino acids, and fatty acids—so damage in this area can lead to nutrient deficiencies and diarrhea. SELF, 11 Feb. 2022 View Sample Sign Up Now Instead, the sugar and other components of fruit quickly move farther down the small intestine to the jejunum and ileum. Markham Heid, Time, 6 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'jejunum.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of jejunum

14th century, in the meaning defined above

History and Etymology for jejunum

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

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The first known use of jejunum was in the 14th century

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Dictionary Entries Near jejunum

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Cite this Entry

“Jejunum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/jejunum. Accessed 3 Oct. 2022.

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More Definitions for jejunum

jejunum

noun
je·​ju·​num | \ ji-ˈjü-nəm How to pronounce jejunum (audio) \
plural jejuna\ -​nə How to pronounce jejunum (audio) \

Medical Definition of jejunum

: 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

More from Merriam-Webster on jejunum

Britannica.com: Encyclopedia article about jejunum

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