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Define the word liothyronine

"liothyronine" wn "WordNet (r) 2.0"

liothyronine
     n : thyroid hormone similar to thyroxine but with one less
         iodine atom per molecule and produced in smaller
         quantity; exerts the same biological effects as thyroxine
         but is more potent and briefer [syn: triiodothyronine,
         T]