thyroid(redirected from Thiroid)
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1. of or relating to the thyroid gland
2. of or relating to the largest cartilage of the larynx
3. See thyroid gland
4. the powdered preparation made from the thyroid gland of certain animals, used to treat hypothyroidism
Dried and powdered thyroid gland which contains about 0.2% iodine in combination, especially as thyroxine, and is used therapeutically in the treatment of thyroid deficiencies.