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thyroglobulin

(thī′rō-glŏbyə-lĭn)
n.
  1. A thyroid protein that is the precursor to iodine-containing hormones and is typically present in the colloid of thyroid gland follicles.
  2. A substance extracted from the thyroid glands of hogs, formerly used as a thyroid hormone supplement to treat hypothyroidism.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.