वाहिकासंकीर्णक — vasoconstrictor (Noun)
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Vasoconstrictor — Causing constriction of the blood vessels; as, the vasoconstrictor nerves, stimulation of which causes constriction of the blood vessels to which they go. These nerves are also called vasohypertonic.
Vasoconstrictor — A substance which causes constriction of the blood vessels. Such substances are used in medicine to raise blood pressure.