from
The Collaborative International Dictionary of English v.0.48
Vasomotor \Vas`o*mo"tor\, a. [L. vas a vessel + motor that which
moves fr. movere to move.] (Physiol.)
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.
[1913 Webster]
{Vasomotor center}, the chief dominating or general center
which supplies all the unstriped muscles of the arterial
system with motor nerves, situated in a part of the
medulla oblongata; a center of reflex action by the
working of which afferent impulses are changed into
efferent, -- vasomotor impulses leading either to dilation
or constriction of the blood vessels.
[1913 Webster]