RhymeZone: levothyroxine definitions

Definitions of levothyroxine:

noun: (pharmacology) 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.

(Definitions from Wiktionary)