The term 'related to the pelvis' can be summarized by the crossword solution 'iliac, ' which is an adjective that refers to the ilium, a large bone in the pelvis. The ilium is part of the hip bone, and it is the largest and most superior of the three bones that make up the pelvis. It is located at the top of the pelvis and is connected to the sacrum and the pubis. The ilium is important for providing stability and support to the lower body.