- the part of the small intestine between the jejunum and the caecum
WordReference Random House Unabridged Dictionary of American English © 2026
il•e•um
(il′ē əm),USA pronunciation n., pl. il•e•a (il′ē ə).USA pronunciation
il′e•al, adj.
- Anatomythe third and lowest division of the small intestine, extending from the jejunum to the cecum. See diag. under intestine.
- Anatomy[Zool.]the anterior portion of the hindgut of an insect or other arthropod.
- Neo-Latin, Medieval Latin īleum, variant of Latin īlia (neuter plural) side of the body between hips and groin, guts, apparently by confusion with Latin īleus ileus
- 1675–85
Collins Concise English Dictionary © HarperCollins Publishers::
ileum /ˈɪlɪəm/ n
'ileum' also found in these entries (note: many are not synonyms or translations):
Crohn's disease
- ileitis
- ileostomy
- jade
- jejunum
- peptic ulcer
- small intestine
- stoma
- ileac
- ileo-
- ileocecal
- ileocolitis
- ileocolostomy
- ilium
- intestine
- mesentery