vasopressor

adj.
Of, relating to, or causing constriction of blood vessels.

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

(vā'zō-prĕs'ər)
adj.

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

n.

An agent that causes a rise in blood pressure.

1. stimulating contraction of the muscular tissue of the capillaries and arteries.
2. a vasopressor agent.

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The noun has one meaning:

Meaning #1: any agent that produces vasoconstriction and a rise in blood pressure (usually understood as increased arterial pressure)

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