Thyroxine
Medical term · T
One of two types of major thyroid hormone manufactured by the thyroid gland. It contains four iodine atoms. Also known as T4.
Related terms
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Thyroid hormoneTwo iodine-containing hormones called thyroxine (T4) and triiodothyronine (T3). They help regulate the body's metabolism and calcium balance.
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Thyroid glandA two-lobed gland located in the front of the neck below the larynx (voice box). It secretes hormones that help regulate the body's metabolism and calcium balance.
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GlandAny organ or tissue that secretes fluids, such as hormones, for use elsewhere in the body or as waste.
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Levothyroxine sodiumA man-made version of the thyroid hormone thyroxine.