pelvis

noun (plural pelvises or pelves /-vēz/)

• 1the large bony structure near the base of the spine to which the hind limbs or legs are attached in humans and many other vertebrates.
• the part of the abdomen including or enclosed by the pelvis.

In humans the pelvis, connected to the base of the spine, forms a basin-shaped hollow frame at the hips, partly supporting the internal organs and providing attachment for the bones and muscles of the legs

• 2 (also renal pelvis) the broadened top part of the ureter into which the kidney tubules drain.