Pronunciation: il'e-um, il'e-a
The broad, flaring portion of the hip bone, distinct at birth but later becoming fused with the ischium and pubis; it consists of a body, which joins the pubis and ischium to form the acetabulum and a broad thin portion, called the ala or wing, bordered superiorly by a thicker crest. The body transmits the weight of the trunk to the femur, whereas the ala and crest provide for muscle attachment and protect abdominopelvic viscera.
[L. groin, flank]
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Examples: glitazone, GI cocktail, etc.