ileum
noun
il·e·um ˈi-lē-əm 
plural ilea ˈi-lē-ə
: the last division of the small intestine extending between the jejunum and large intestine
ileal
ˈi-lē-əl
adjective 
Example Sentences
Recent Examples on the Web The chance of making that diagnosis goes up markedly when the terminal ileum is included. 
Lisa Sanders, New York Times, 15 Sep. 2020 Nicholas' ileum, the final section of his small intestine, is full of pus and ulcers. Mark Johnson And Kathleen Gallagher, Milwaukee Journal Sentinel, 21 Dec. 2010 The ileum is not scoped during a routine screening because doing so takes more time and because the chance of finding something significant is small. Lisa Sanders, New York Times, 15 Sep. 2020 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
Lisa Sanders, New York Times, 15 Sep. 2020 Nicholas' ileum, the final section of his small intestine, is full of pus and ulcers. Mark Johnson And Kathleen Gallagher, Milwaukee Journal Sentinel, 21 Dec. 2010 The ileum is not scoped during a routine screening because doing so takes more time and because the chance of finding something significant is small. Lisa Sanders, New York Times, 15 Sep. 2020 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 Word History
Etymology
New Latin, alteration of Latin ilia, plural, groin, viscera
First Known Use
1682, in the meaning defined above
Medical Definition
ileum
noun
il·e·um ˈil-ē-əm
plural ilea -ē-ə
: the last division of the small intestine that constitutes the part between the jejunum and large intestine and in humans forms the last three fifths of the part of the small intestine beyond the end of the duodenum and that is smaller and thinner-walled than the jejunum with fewer circular folds but more numerous Peyer's patches