Word Study
iodothyrin
CIDE DICTIONARY
iodothyrin, n. [Iodo- + thyro- + -in.].
A peculiar substance obtained from the thyroid gland, containing from nine to ten per cent of iodine.
" It is a very stable compound, and is believed to be active principle in thyroid extracts and in the internal secretion of the thyroid gland. It was originally called thyroiodin ." [Webster 1913 Suppl.]
" It is probably an impure extract of thyroid gland, containing thyroxine. See Merck Index 11th Ed. #9345, the entry for thyroidin." [PJC]
For further exploring for "iodothyrin" in Webster Dictionary Online