What is deep socket in the coxal bone that receives head of thigh bone?

The deep socket in the coxal bone that receives the head of the thigh bone is called the acetabulum. It is a cup-shaped depression located on the lateral aspect of the pelvis. The acetabulum is formed by the fusion of the ilium, ischium, and pubis bones. The head of the femur (thigh bone) fits into the acetabulum, forming the hip joint. The acetabulum is lined with hyaline cartilage, which provides a smooth, low-friction surface for the head of the femur to move on.