vasoconstrictor

noun Physiology, Pharmacology.

1. a nerve or drug that causes vasoconstriction.

noun

1. a drug, agent, or nerve that causes narrowing (vasoconstriction) of the walls of blood vessels

adjective

2. causing vasoconstriction

n.

1. Something, such as a nerve or drug, that causes vasoconstriction.

adj.

1. Producing vasoconstriction.