The term 'Hipbones' is composed of two anatomical terms, 'Coxae' and 'Ilia'. Coxae are the two hip bones that form the lateral walls of the pelvic cavity. They are also known as the hip joints and are connected to the sacrum and the femur. Ilia are the two large, flat bones that form the upper part of the pelvis. They are located at the sides of the sacrum and are connected to the lumbar vertebrae. Together, the Coxae and Ilia form the Hipbones, which provide support and stability to the body.