Definition of renal pelvis
anatomy
: a funnel-shaped structure in each kidney that receives urine from the collecting duct for passage into the ureter and that is formed at one end by the expanded upper portion of the ureter and at the other end by the union of two or more calyxes (see calyx sense 2) of the kidney
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Merriam-Webster unabridged
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Time Traveler for renal pelvis
The first known use of renal pelvis was in 1757
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