What does antidiuretic hormone mean?
• ANTIDIURETIC HORMONE (noun) The noun ANTIDIURETIC HORMONE has 1 sense: 1. 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 Familiarity information: ANTIDIURETIC HORMONE used as a noun is very rare.