The term 'Part of the Hipbone' refers to two bones in the human body, the ILIUM and the ischium. The ILIUM is a large, fan-shaped bone that forms the upper part of the hipbone. It is located at the top of the pelvis and is connected to the sacrum and the spine. The ischium is a curved, triangular bone located at the lower part of the hipbone. It is connected to the pubis and the femur and provides support for the body when sitting. Together, the ILIUM and ischium form the hipbone, which is an important part of the human skeleton.