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xanthinuria

(zăn′thə-nurē-ə)
n.
  1. Excretion of abnormally large amounts of xanthine in the urine.
  2. An inherited metabolic disorder resulting from defective synthesis of xanthine oxidase and characterized by urinary excretion of xanthine in place of uric acid.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.