parathyroid hormone: hormone synthesized and released into the blood stream by the parathyroid glands; regulates phosphorus and calcium in the body and functions in neuromuscular excitation and blood clotting
hormone: the secretion of an endocrine gland that is transmitted by the blood to the tissue on which it has a specific effect
redeemer: someone who redeems or buys back (promissory notes or merchandise or commercial paper etc.)