1. Producing vasoconstriction and a rise in blood pressure, usually understood to be systemic arterial pressure unless otherwise specified. 2. An agent that has this effect.
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va·so·pres·sor -'pres-ər adj causing a rise in blood pressure by exerting a vasoconstrictor effect <\vasopressor drugs>
vasopressor n a vasopressor agent (as a drug)
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adj.
stimulating the contraction of blood vessels and therefore bringing about an increase in blood pressure.
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vaso·pres·sor (va″zo-) (vas″o-presґər) 1. stimulating contraction of the muscular tissue of the capillaries and arteries. 2. an agent that stimulates contraction of the muscular tissue of the capillaries and arteries.Medical dictionary. 2011.