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| thy·rox·ine [ thī rók sn ] or thy·rox·in [ thī róksin ] |
noun |
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| Definition: |
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chief thyroid hormone: the principal hormone secreted by the thyroid gland, which stimulates metabolism and is essential for normal growth and development. A synthetic form is used to treat hypothyroidism.
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| [Early 20th century. <thyro- + oxy- + indole (from a misunderstanding of its chemical structure), altered after -ine] |
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