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Recommended video: Hip bone and femur [18:00]
Bones, ligaments and joints of the hip bone and femur.

The ilium is one of the three bony components of the hip bone, which is the main bone of the pelvis. The ilium forms the most superior and largest part of the hip bone.

It has a smaller lower part, which contributes to the formation of the acetabulum, and an expanded fan-shaped upper part (or wing), which provides support for the lower abdomen (or false pelvis).

The other two components of the hip bone are the ischium, which forms the posterior and inferior part, and the pubis (or pubic bone), which is located anteriorly. The three components of the hip bone are united at the acetabulum.

Terminology English: Ilium
Latin: Os ilium, ilium
Synonym: Iliac bone 
Definition The widest and most superior component of the hip bone 

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