|wedge-shaped bone, especially one of three bones in the tarsus of the foot|
|bone in the distal row of the carpus at the base of the thumb|
ilium il·i·um (ĭl'ē-əm)
n. pl. il·i·a (-ē-ə)
The uppermost and widest of the three bones constituting either of the lateral halves of the pelvis. Also called iliac bone.