Meaning of ileum in English:


Pronunciation /ˈɪlɪəm/

nounplural noun ilea/ˈɪlɪə/

  • The third portion of the small intestine, between the jejunum and the caecum.

    ‘The midgut eventually develops into distal duodenum, jejunum, ileum, caecum, appendix, ascending colon, and proximal two thirds of the transverse colon.’
    • ‘The latter might be a confusion with ileum, the third portion of the small intestine.’
    • ‘Ultimately, the shunts were converted to jejunoileostomies in which the upper portion of the jejunum was anastomosed to the lower portion of the ileum.’
    • ‘Approximately 90% of the fluid contained in the ileum (ie, distal portion of the small intestine) is absorbed in the colon.’
    • ‘The patient was treated with surgical resection of the distal jejunum, proximal ileum, and the 3 nodules of the liver.’


Late 17th century from medieval Latin, variant of ilium.