thyroxine

T1H4Y4R1O1X8I1N1E1
UK/θaɪˈrɒk.siːn/UK/-sɪn/US/θaɪˈrɒk.sin/

noun

A thyroid hormone, with the chemical formula C₁₅H₁₁I₄NO₄, that regulates cell metabolism and growth.

Similar
tetraiodothyroninethyroxinT
OriginEnglish ox- ← New Latin thyreoīdēs ← Ancient Greek θῠρεοειδής (thŭreoeidḗs) →
UncommonScrabble 22
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Meanings

nounthyroxine (countable and uncountable, plural thyroxines, abbreviation T4)

plural thyroxines · abbreviation T4

  1. countableuncountablebiochemistryA thyroid hormone, with the chemical formula C₁₅H₁₁I₄NO₄, that regulates cell metabolism and growth.

    Synonyms: tetraiodothyronine

Synonyms & antonyms

nounA thyroid hormone, with the chemical formula C₁₅H₁₁I₄NO₄, that regulates cell metabolism and growth.

Similar
tetraiodothyronine

More synonyms by meaning

nounhormone produced by the thyroid glands to regulate metabolism by controlling the rate of oxidation in cells

Similar
thyroxintetraiodothyronineT
Broader
thyroid hormone
Also see
ttetraiodothyronine

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

  1. Proto-Indo-European*dʰwer-
  2. Proto-Hellenic*tʰurā
  3. Ancient Greekθῠ́ρᾱ (thŭ́rā)
  4. Ancient Greekθῠρεός (thŭreós)
  5. Proto-Indo-European*weyd-
  6. Proto-Indo-European*wéydos
  7. Proto-Hellenic*wéidos
  8. Ancient Greekεἶδος (eîdos)
  9. Ancient Greekθῠρεοειδής (thŭreoeidḗs)
  10. New Latinthyreoīdēs
  11. Englishthyroid
  12. Englishthyr-
  13. Englishox-
  14. Englishthyroxine

From thyr- (“thyroid”) + ox- (“oxygen”) + -ine.

Full word history & related roots →

Translations

Chinese Mandarin 甲狀腺素 /甲状腺素
  • 甲狀腺素 /甲状腺素 (jiǎzhuàngxiànsù)thyroid hormone
Finnish tyroksiini
  • tyroksiinithyroid hormone
French thyroxine
  • thyroxinethyroid hormone
Italian tiroxina
  • tiroxinathyroid hormone
Māori taiaki tenga
  • taiaki tengathyroid hormone
Portuguese tiroxina
  • tiroxinathyroid hormone
Spanish tiroxina
  • tiroxinathyroid hormone
Swedish tyroxin
  • tyroxinthyroid hormone
Turkish tiroksin
  • tiroksinthyroid hormone

Rhymes & wordplay

Rhymes with thyroxine

toxindioxindigoxinlevothyroxinetocsinamatoxinantiantitoxindifenoxingastrotoxinkurtoxinlycotoxinmitotoxinophiotoxinvomitoxin
All rhymes →
Cite this entry
APA

thyroxine. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/thyroxine

MLA

“thyroxine.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/thyroxine. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “thyroxine,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/thyroxine.

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