What does "levothyroxine" mean?

The levorotatory isomer of thyroxine (trademark Levothyroid, Levoxyl, Synthroid) that is administered in the form of its sodium salt C₁₅H₁₀I₄NNaO₄ in the treatment of hypothyroidism.

What is a synonym for "levothyroxine"?

Common synonyms include: synthroid.

How do you pronounce "levothyroxine"?

Pronounced //ˌli.voʊ.θaɪˈɹɑkˌsin//.

Levothyroxine

//ˌli.voʊ.θaɪˈɹɑkˌsin// noun

noun ·Rare ·Advanced level

Definitions

Noun

1
The levorotatory isomer of thyroxine (trademark Levothyroid, Levoxyl, Synthroid) that is administered in the form of its sodium salt C₁₅H₁₀I₄NNaO₄ in the treatment of hypothyroidism. uncountable

Synonyms

All synonyms

synthroid

Etymology

From levo- + thyroxine.

Related phrases

levothyroxine sodium

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.