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jejunum Syllabification: je·ju·num
Pronunciation: /jəˈjo͞onəm/

Definition of jejunum in English:

noun (plural jejuna-nə)

The part of the small intestine between the duodenum and ileum.
Example sentences
  • The midgut eventually develops into distal duodenum, jejunum, ileum, caecum, appendix, ascending colon, and proximal two thirds of the transverse colon.
  • Small bowel bleeding involving the jejunum and ileum is less common and more difficult to detect scintigraphically.
  • Acute cholecystitis may cause the gall bladder to adhere to the adjacent jejunum or duodenum.


Pronunciation: /ˈjo͞onl/
Example sentences
  • The distal duodenum and duodenal jejunal junction is especially susceptible to damage because it is fixed in position.
  • Ileal and jejunal duplication cysts that contain ectopic gastric mucosa are also rare causes of false positive studies.
  • The patient had 2 notable congenital abnormalities: multiple dissecting pulmonary arterial aneurysms distributed in both lungs and multiple jejunal atresia with apple-peel deformity.


Mid 16th century: from medieval Latin, neuter of jejunus 'fasting' (because it is usually found to be empty after death).

Definition of jejunum in:
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