renal papilla

noun

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

Word History

First Known Use

1744, in the meaning defined above

Medical Definition

renal papilla

noun

: the apex of a renal pyramid which projects into the lumen of a calyx of the kidney and through which collecting ducts discharge urine