Definify.com
Webster 1913 Edition
Ileum
‖
Il′e-um
,Noun.
[L.
ile
, ileum
, ilium
, pl. ilia
, groin, flank.] 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.