the structure of the vertebrate skeleton supporting the lower limbs in humans and the hind limbs or corresponding parts in other vertebrates

a bony or cartilaginous arch that supports the hind limbs of a vertebrate

In humans, the bony arch by which the legs are attached to the rest of the skeleton; composed of the two hipbones. PICTURE

plate-shaped bones for limb attachment

The bony ring composed of the two hip bones laterally and in front, and the sacrum and coccyx behind.