a hormone secreted by the posterior lobe of the pituitary gland, that increases blood pressure by constricting the arterioles
Origin:
< vaso- + press(ure) + -in
See vasopressin in American Heritage Dictionary 4
noun
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.