1. vasodilator - Noun
2. vasodilator - Adjective
Causing dilation or relaxation of the blood vessels; as, the vasodilator nerves, stimulation of which causes dilation of the blood vessels to which they go. These nerves are also called vaso-inhibitory, and vasohypotonic nerves, since their stimulation causes relaxation and rest.
Source: Webster's dictionaryNifedipine is more a potent vasodilator and more effective in angina. Source: Internet
On occasion, it is used in emergency medical situations to produce a rapid decrease in blood pressure in humans; it is also used as a vasodilator in vascular research. Source: Internet