Re″nal (r?″nal), a. [L. renalis, fr. renes the kidneys or reins: cf. F. rénal. See Reins.] (Anat.) Of or pertaining to the kidneys; in the region of the kidneys.
Renal calculus(Med.), a concretion formed in the excretory passages of the kidney. — Renal capsulesorglands, the suprarenal capsules. See under Capsule. — Renal casts, Renal colic. (Med.) See under Cast, and Colic.