levothyroxine

/L EH1 V AH0 TH AY1 R AA1 K S AY0 N/
noun
  1. 1

    (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.

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