vasodilator Meaning, Definition & Usage

  1. noun a drug that causes dilation of blood vessels
    vasodilative.

WordNet

Vas`o*di*lat"or adjective
Etymology
L. vas a vessel + dilator.
Definitions
  1. (Physiol.) 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.

Webster 1913