Vas`o*con*strict"or (?), a. Physiol.
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.
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n.
A substance which causes constriction of the blood vessels. Such substances are used in medicine to raise blood pressure.
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© Webster 1913.