noun Biochemistry, Physiology.
- a polypeptide hormone, produced in the parathyroid glands, that helps regulate the blood levels of calcium and phosphate. Abbreviation: PTH
- the hormone secreted by the parathyroid glands that controls the level of calcium in the blood: a deficiency of the hormone often results in tetanyAlso called: parathormone (ˌpærəˈθɔːməʊn)
- A peptide hormone produced by the parathyroid glands that regulates the amount of calcium in the body.parathyrin