ileum Meaning, Definition & Usage

  1. noun the part of the small intestine between the jejunum and the cecum

WordNet

Il"e*um noun
Etymology
L. ile, ileum, ilium, pl. ilia, groin, flank.
Definitions
  1. (Anat.) The last, and usually the longest, division of the small intestine; the part between the jejunum and large intestine. Written also ileon, and ilium.
  2. (Anat.) See Ilium. R. ✍ Most modern writers restrict ileum to the division of the intestine and ilium to the pelvic bone.

Webster 1913