VASODILATOR By N., Pam M.S. - April 29, 2013 noun. any drug or other substance which acts to widen the girth of blood vessels, usually by calming smooth muscle in the arterial walls. VASODILATOR: "Vasodilators are often utilized for the remediation of high blood pressure and angina pectoris." Related Psychology Terms VASOMOTOR AMYL NITRITE VASOCONSTRICTOR ARTERIOPATHIA HYPERTONICA ANASTOMOSIS PREORGASMIC PULSE SMOOTH MUSCLE ARTERIOLE REACTION VASCULAR SCLEROSIS Cite this page: N., Pam M.S., "VASODILATOR," in PsychologyDictionary.org, April 29, 2013, https://psychologydictionary.org/vasodilator/ (accessed August 5, 2020).