urinary calculus
    n 1: a calculus formed in the kidney [syn: kidney stone,
         urinary calculus, nephrolith, renal calculus]

Urinary \U"ri*na*ry\, a. [L. urina urine: cf. F. urinaire.]
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   1. Of or pertaining to the urine; as, the urinary bladder;
      urinary excretions.
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   2. Resembling, or being of the nature of, urine.
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   Urinary calculus (Med.), a concretion composed of some one
      or more crystalline constituents of the urine, liable to
      be found in any portion of the urinary passages or in the
      pelvis of the kidney.

   Urinary pigments, (Physiol. Chem.), certain colored
      substances, urochrome, or urobilin, uroerythrin, etc.,
      present in the urine together with indican, a colorless
      substance which by oxidation is convertible into colored
      bodies.
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