Ilium
Pronunciation : Il"i*um
Part of Speech : n.
Etymology : [See Ileum.] (Anat.)
Definition : Defn: 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.]
Source : Webster's Unabridged Dictionary, 1913