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.
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.
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.
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) […]
- Parathyroid tetany
parathyroid tetany n. Tetany following surgical injury to or excision of the parathyroid glands. Also called parathyroprival tetany.
[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.