n. A drug or chemical agent that causes dilation of the blood vessels thereby reducing blood pressure.
the GNU version of the Collaborative International Dictionary of English
adj. 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.
n. A substance which causes dilation of blood vessels.
The Century Dictionary and Cyclopedia
Serving to dilate or relax blood-vessels when stimulated, as a nerve. See vasomotor.
n. That which causes dilatation of the blood-vessels: applied to nerves and certain drugs.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a drug that causes dilation of blood vessels
Word Usage
"Futura's condoms contain a gel with an agent that boosts blood flow—a so-called vasodilator—which is absorbed through the skin, enhancing erections."