vasoconstrictor

(vā'zō-kən-strĭk'tər)
n.
Something, such as a nerve or drug, that causes vasoconstriction.

(vā′zōkənstrik′tur)
n

(vasopressor), an agent that causes a rise in blood pressure by constricting the blood vessels. In local areas, it causes constriction of the arterioles and capillaries.

An agent, such as epinephrine, that causes constriction of blood vessels.

1. causing constriction of the blood vessels.
2. a vasoconstrictive agent.

• v. agents — includes some prostaglandins, thromboxane A₂, leukotriene D₄, angiotensin II, vasopressin, neuropeptide Y, endothelin.
• v. fibers — adrenergic nerve fibers in the walls of all blood vessels except capillaries.