Definition of ileum in English:

ileum

Syllabification: il·e·um
Pronunciation: /ˈilēəm
 
/

noun (plural ilea /ˈilēə/)

Anatomy
  • The third portion of the small intestine, between the jejunum and the cecum.
    More example sentences
    • 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.

Derivatives

ileac

adjective
More example sentences
  • Two tumors were spindle cell leiomyosarcomas (gastric and ileac); 1 was an epithelioid leiomyosarcoma of the colon; and 1 was an epithelioid GIST of the colon.

ileal

adjective
More example sentences
  • Sections from the ileum showed the polyps to be composed of multiple closely aggregated lymphoid follicles in the lamina propria of the ileal mucosa.
  • Hydrochloric acid and pepsin secreted by the gastric mucosa cause the adjacent ileal mucosa of the intestine to erode and ulcerate since the normal protective mucosa is missing.
  • Their mesentery contains ileal arteries and veins, which are also branches of the superior mesenteric artery.

Origin

late 17th century: from medieval Latin, variant of ilium.

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