The term 'BONES IN PELVISES' can be summarized as the ilia, which are four-letter bones located in the pelvis. The ilia are two large, flat bones that form the sides and the back of the pelvis. They are connected to the sacrum at the base of the spine and to the pubic bones in the front. The ilia also provide attachment points for muscles and ligaments that help support the body and allow for movement.