- The act of transfusing, or pouring, as liquor, out of
one vessel into another. - The act or operation of transferring the blood of one
man or animal into the vascular system of another; also, the
introduction of any fluid into the blood vessels, or into a cavity of
the body from which it can readily be adsorbed into the vessels;
intrafusion; as, the peritoneal transfusion of milk.