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Schilling test

(shĭlĭng)
n.
  1. A test for determining the amount of vitamin B12 excreted in the urine, in which vitamin B12 tagged with a radioisotope is taken orally and quantified in urine samples.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.