Definify.com
Webster 1913 Edition
Ilium
‖
Il′i-um
,Noun.
[See
Ileum
.] (Anat.)
The dorsal one of the three principal bones comprising either lateral half of the pelvis; the dorsal or upper part of the hip bone. See
Innominate bone
, under Innominate
. [Written also
ilion
, and ileum
.]