Vasoconstrictor

a.	1.	(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.
n.	1.	(Medicine, Physiology) A substance which causes constriction of the blood vessels. Such substances are used in medicine to raise abnormally low blood pressure.

Noun

1.

vasoconstrictor - any agent that causes a narrowing of an opening of a blood vessel: cold or stress or nicotine or epinephrine or norepinephrine or angiotensin or vasopressin or certain drugs; maintains or increases blood pressure Synonyms: vasoconstrictive

ADH, Adrenalin, adrenaline, adrenergic, adrenergic drug, agent, angiotensin, angiotonin, antidiuretic hormone, cold, coldness, epinephrin, epinephrine, Hypertensin, low temperature, lypressin, naphazoline, nicotine, noradrenaline, norepinephrine, Pitressin, Privine, stress, Sudafed, tenseness, tension, vasoconstrictive, vasopressin, vasopressor