Definition of renal papilla
anatomy
: the apex of a renal pyramid which projects into the cavity of a calyx (see calyx sense 2) of the kidney and through which collecting ducts discharge urine
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“Renal papilla.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/renal%20papilla. Accessed 18 Apr. 2021.
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The first known use of renal papilla was in 1744
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