The American Heritage® Dictionary of the English Language, 4th Edition
n. A hormone secreted by the posterior lobe of the pituitary gland that constricts blood vessels, raises blood pressure, and reduces excretion of urine. Also called antidiuretic hormone.
n. An antidiuretic hormone secreted by the pituitary gland
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. hormone secreted by the posterior pituitary gland (trade name Pitressin) and also by nerve endings in the hypothalamus; affects blood pressure by stimulating capillary muscles and reduces urine flow by affecting reabsorption of water by kidney tubules
Word Usage
"By targeting receptors of a hormone called vasopressin, it is hoped that the investigational drug will prove effective in controlling the abnormal contractions that cause painful periods."