The term 'of the hip bones' refers to the two large bones that make up the pelvis, the ilium and the ischium. The ilium is the uppermost and largest of the two bones, and it is also known as the ilium or the iliac bone. It is five letters long, and its name comes from the Latin word for flank. The ilium forms the upper part of the hip joint, and it is connected to the sacrum and the spine. The ischium is the lowermost and smallest of the two bones, and it is also known as the ischium or the ischial bone. It forms the lower part of the hip joint, and it is connected to the pubis and the femur. Together, the ilium and the ischium form the hip bones, which are essential for providing stability and support to the body.