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Definitions of vasodilator

  1. a drug that causes dilation of blood vessels Scrapingweb Dictionary DB
  2. 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 Dictionary DB
  3. Relaxing or enlarging the vessels. A dictionary of scientific terms. By Henderson, I. F.; Henderson, W. D. Published 1920.