EPINEPHRINE

also epinephrin noun see: nephritis Date: 1899 a colorless crystalline feebly basic sympathomimetic hormone C 9 H 13 NO 3 that is the principal blood-pressure raising hormone secreted by the adrenal medulla and is used medicinally especially as a heart stimulant, a vasoconstrictor in controlling hemorrhages of the skin, and a muscle relaxant in bronchial asthma