The Collaborative International Dictionary of English v.0.48:

Renal \Re"nal\ (r[=e]"nal), a. [L. renalis, fr. renes the
   kidneys or reins: cf. F. r['e]nal. See Reins.] (Anat.)
   Of or pertaining to the kidneys; in the region of the
   kidneys.
   [1913 Webster]

   Renal capsules or Renal glands, the suprarenal capsules.
      See under Capsule.

   Renal casts, Renal colic. (Med.) See under Cast, and
      Colic.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Colic \Col"ic\, n. [F. colique, fr. L. colicus sick with the
   colic, Gr. ?, fr. ?, ?, the colon. The disease is so named
   from its being seated in or near the colon. See Colon.]
   (Med.)
   A severe paroxysmal pain in the abdomen, due to spasm,
   obstruction, or distention of some one of the hollow viscera.
   [1913 Webster]

   Hepatic colic, the severe pain produced by the passage of a
      gallstone from the liver or gall bladder through the bile
      duct.

   Intestinal colic, or Ordinary colic, pain due to
      distention of the intestines by gas.

   Lead colic, Painter's colic, a violent form of intestinal
      colic, associated with obstinate constipation, produced by
      chronic lead poisoning.

   Renal colic, the severe pain produced by the passage of a
      calculus from the kidney through the ureter.

   Wind colic. See Intestinal colic, above.
      [1913 Webster]

WordNet (r) 3.0 (2006):

renal colic
    n 1: sharp pain in the lower back that radiates into the groin;
         associated with the passage of a renal calculus through the
         ureter