thyronine

noun
thy·​ro·​nine | \ ˈthī-rə-ˌnēn How to pronounce thyronine (audio) , -nən How to pronounce thyronine (audio) \

Medical Definition of thyronine

: a phenolic amino acid C15H15NO4 of which thyroxine is a derivative also : any of various derivatives and especially iodinated derivatives of this

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