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Definition of Renal medulla
1. Noun. (anatomy) The inner most region of the kidney, arranged into pyramid like structures, consisting of the collecting tubules, Henle's loop, vasa rectae, venulae rectae and the medullary capillary plexus. ¹
¹ Source: wiktionary.com
Medical Definition of Renal medulla
1. The centre portion of the kidney. (27 Sep 1997)