noun (plural ilia /ˈɪlɪə/)
The large broad bone forming the upper part of each half of the pelvis.
- This tilting of the pelvis is effected by the gluteal muscles, which connect the ilium of the hip bone to the lower limb.
- The two coxal bones grow from three separate bones, the ilium, ischium, and pubis.
- The acetabulum is a hemispherical socket formed in the os coxae (ie, bony pelvis) of a newborn where the ilium, ischium, and pubis bones come together.
Late Middle English (originally in the Greek form ilion, and denoting the ileum): from Latin, singular of ilia 'flanks, entrails'. Current senses date from the late 16th century.