Definitions for vasomotorˌvæs oʊˈmoʊ tər, ˌveɪ zoʊ-
Random House Webster's College Dictionary
vas•o•mo•torˌvæs oʊˈmoʊ tər, ˌveɪ zoʊ-(adj.)
regulating the diameter of blood vessels, as certain nerves.
Origin of vasomotor:
relating to the nerves and muscles that cause the blood vessels to constrict or dilate
Of or pertaining to the regulation of the diameter of blood vessels.
causing movement in the walls of vessels; as, the vasomotor mechanisms; the vasomotor nerves, a system of nerves distributed over the muscular coats of the blood vessels