noun Pathology.
inflammation of the thyroid gland.

1880–85; thyroid + -itis Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
thyroiditis (ˌθaɪrɔɪˈdaɪtɪs)
inflammation of the thyroid gland

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

thyroiditis thy·roid·i·tis (thī'roi-dī'tĭs)
Inflammation of the thyroid gland. Also called thyroadenitis.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Britannica


any of many inflammatory diseases of the thyroid gland. Several nonspecific types of thyroiditis, both acute and chronic, may be caused by bacterial and viral organisms. There are, however, two specific, noninfectious types of thyroiditis: (1) Hashimoto's disease (q.v.), or struma lymphomatosa, and (2) granulomatous thyroiditis (q.v.), sometimes referred to as giant cell thyroiditis, pseudotuberculous thyroiditis, or de Quervain's thyroiditis. A very rare chronic thyroid inflammation is Riedel thyroiditis (q.v.), or struma fibrosa.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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