The acetabulum is the socket for which bone?

Explanation

**Step-by-Step Solution:**

1. **Understanding the Acetabulum**: The acetabulum is a part of the pelvis and is also referred to as the cotyloid cavity. It is a concave surface that plays a crucial role in the hip joint.

2. **Location of the Acetabulum**: The acetabulum is located on the lateral aspect of the pelvis. It is formed by the fusion of three bones: the ilium, ischium, and pubis.

3. **Function of the Acetabulum**: The primary function of the acetabulum is to serve as a socket for the hip joint. It allows for the articulation of the femur.

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