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athyroidism

(ā-thī′roi-dĭz′əm, ə-thī′-)
n.
  1. The absence of the thyroid gland or the suppression of its secretion.
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Related formsa′thy•rot′ic (ā′thī-rŏt′ĭk, ăth′ī-) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.