- the basinlike cavity in the lower part of the trunk of many vertebrates, formed in humans by the innominate bones, sacrum, etc.
- the bones forming this cavity.
- the cavity of the kidney that receives the urine before it is passed into the ureter.
- the large funnel-shaped structure at the lower end of the trunk of most vertebrates: in man it is formed by the hipbones and sacrum
- the bones that form this structure
- any anatomical cavity or structure shaped like a funnel or cup
- short for renal pelvis
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