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metanephrine

(mĕt′ə-nĕfrĭn, -rēn′)
n.
  1. A catabolite of epinephrine excreted in the urine and found in some tissues.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.