Origin of calcitonin
calci- + -tonin (as in serotonin)
First Known Use: 1961
Medical Definition of calcitonin
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
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