vasodilator

Something, such as a nerve or drug, that causes vasodilation.

Serving to dilate or relax blood-vessels when stimulated, as a nerve. See vasomotor.

That which causes dilatation of the blood-vessels: applied to nerves and certain drugs.

A substance which causes dilation of blood vessels.

Causing dilation or relaxation of the blood vessels. These nerves are also called vaso-inhibitory, and vasohypotonic nerves, since their stimulation causes relaxation and rest.

A drug or chemical agent that causes dilation of the blood vessels thereby reducing blood pressure.

a drug that causes dilation of blood vessels