antithyroid

A1N1T1I1T1H4Y4R1O1I1D2

adjective

Reducing the production or effects of thyroid hormones.

UncommonScrabble 18

Meanings

adjectiveantithyroid (not comparable)
  1. not comparablebiochemistryReducing the production or effects of thyroid hormones.

    2005, The American Thyroid Association, "Hyperthyroidism", Drugs known as antithyroid agents—methimazole (Tapazole®) or propylthiouracil (PTU)—may be prescribed if your doctor chooses to treat the hyperthyroidism by blocking the thyroid gland’s ability to make new thyroid hormone.

    3 more examples

    A RECENT report by Anderson et al. on the antithyroid activity of a series of alkyl derivatives of thiouracil shows that peak activity is reached at the n-propyl compound.

    1946 May 18, E. M. Bavin, D. A. Goodchild, “Antithyroid Activity of Thiouracil Derivatives”, in Nature, 157, 659-660

    Postmortem histological examination of the thyroid gland and measurement of serum antithyroid antibodies were performed in 70 patients without overt thyroid disease.

    1978, H. Yoshida et al., “Association of serum antithyroid antibodies with lymphocytic infiltration of the thyroid gland: studies of seventy autopsied cases”, in The Journal of Clinical Endocrinology and Metabolism, 46(6):859-862

    Antithyroid drugs, which have been in use for more than half a century, remain cornerstones in the management of hyperthyroidism, especially for patients with Graves' disease.

    2005 March, D. S. Cooper, “Antithyroid Drugs”, in The New England Journal of Medicine, 352(9):905-917

    Synonyms: thyrostatic

Synonyms & antonyms

adjectiveReducing the production or effects of thyroid hormones.

Origin

  1. Proto-Indo-European*h₂ent-
  2. Proto-Indo-European*h₂énts
  3. Proto-Indo-European*h₂énti
  4. Ancient Greekᾰ̓ντῐ́ (ăntĭ́)
  5. Ancient Greekἀντι- (anti-)
  6. Englishanti-
  7. Proto-Indo-European*dʰwer-
  8. Proto-Hellenic*tʰurā
  9. Ancient Greekθῠ́ρᾱ (thŭ́rā)
  10. Ancient Greekθῠρεός (thŭreós)
  11. Proto-Indo-European*weyd-
  12. Proto-Indo-European*wéydos
  13. Proto-Hellenic*wéidos
  14. Ancient Greekεἶδος (eîdos)
  15. Ancient Greekθῠρεοειδής (thŭreoeidḗs)
  16. New Latinthyreoīdēs
  17. Englishthyroid
  18. Englishantithyroid

Coined in 1908 from anti- + thyroid.

Full word history & related roots →

Translations

Indonesian antitiroid
  • antitiroidreducing the production or effects of thyroid hormones
Italian antitiroideo
  • antitiroideoreducing the production or effects of thyroid hormones
Portuguese antitireoide
  • antitireoidereducing the production or effects of thyroid hormones
Spanish antitiroideos
  • antitiroideosreducing the production or effects of thyroid hormones
Cite this entry
APA

antithyroid. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/antithyroid

MLA

“antithyroid.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/antithyroid. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “antithyroid,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/antithyroid.

Source: antithyroid on Wiktionary, CC BY-SA 4.0.