- vasopressin, antidiuretic hormone, ADH, Pitressin - 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
--1 is a kind of hormone, endocrine, internal secretion; vasoconstrictor, vasoconstrictive