noun, Anatomy.
any of several small oval glands usually lying near or embedded in the thyroid gland.
any one of the small egg-shaped endocrine glands situated near or embedded within the thyroid gland: they secrete parathyroid hormone

parathyroid gland n.
Any of usually four small kidney-shaped glands that lie in pairs near or within the posterior surface of the thyroid gland and secrete a hormone necessary for the metabolism of calcium and phosphorus.
parathyroid gland
Any of four kidney-shaped glands located behind or within the thyroid gland of many vertebrate animals. ◇ The parathyroid glands secrete parathyroid hormone, which regulates the amount of calcium in the blood.


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    noun, Pharmacology. 1. an aqueous preparation obtained from the parathyroid gland of cattle, used in medicine chiefly in cases of parathyroid deficiency and in veterinary medicine in the treatment of tetanic convulsions.

  • Parathyroid-hormone

    noun, Biochemistry, Physiology. 1. a polypeptide hormone, produced in the parathyroid glands, that helps regulate the blood levels of calcium and phosphate. Abbreviation: PTH. noun 1. the hormone secreted by the parathyroid glands that controls the level of calcium in the blood: a deficiency of the hormone often results in tetany Also called parathormone (ˌpærəˈθɔːməʊn) […]

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    parathyroid tetany n. Tetany following surgical injury to or excision of the parathyroid glands. Also called parathyroprival tetany.

  • Para-toluidine

    [par-uh-tuh-loo-i-deen, -din] /ˌpær ə təˈlu ɪˌdin, -dɪn/ noun, Chemistry. 1. a white, flaky, lustrous, very slightly water-soluble solid, C 7 H 9 N, the para isomer of toluidine, used in the manufacture of dyes, in organic synthesis, and as a reagent in tests for nitrite, lignin, and phloroglucinol.

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