vasopressor

noun Biochemistry, Pharmacology.

1. a hormone, as epinephrine, or other agent that raises the blood pressure by causing contraction of the arteriole muscles, narrowing the arteriole passage.

adjective

1. causing an increase in blood pressure by constricting the arteries

noun

2. a substance that has such an effect

adj.

1. Producing constriction of the blood vessels and a consequent rise in blood pressure.

n.

1. An agent that causes a rise in blood pressure.