nounWord forms:  plural -vises or -ves (-viːz)1. the large funnel-shaped structure at the lower end of the trunk of most vertebrates: in humans it is formed by the hipbones and sacrum
 2. the bones that form this structure
 3. any anatomical cavity or structure shaped like a funnel or cup
 4.   short for renal pelvis 
 Word origin
C17: from Latin: basin, laver