Main Entry: cal·ci·to·nin

Pronunciation: \ˌkal-sə-ˈtō-nən\

Function: noun

1 : a polypeptide hormone especially from the thyroid gland that tends to lower the level of calcium in the blood plasma—called also thyrocalcitonin
2 : a synthetic or recombinant form of calcitonin used to treat Paget's disease of bone and postmenopausal osteoporosis