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| thy·roid gland (plural thy·roid glands) |
noun |
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| Definition: |
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ductless gland in base of neck: an endocrine gland located in the neck of human beings and other vertebrate animals that secretes the hormones responsible for controlling metabolism and growth. Excessive action of the thyroid gland can cause Graves' disease, while underactivity can cause myxedema.
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