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Meaning of calcitonin

cal•ci•to•nin

Pronunciation: (kal"si-tō'nin), [key]
— n. Biochem.
  1. a polypeptide hormone that participates in the regulation of calcium levels in vertebrates by inhibiting loss of calcium from bone to the blood.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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