n. any drug or other agent that serves to increase the diameter of blood vessels, generally by relaxing smooth muscle in arterial walls. Vasodilators are commonly used in the treatment of hypertension and angina pectoris.
n. an inflammation of the pancreas, marked by severe abdominal pain and caused by biliary tract disorders (e.g., gallstones), alcoholism, viral infection, or reactions to certain drugs (e.g., some antipsychotic agents).