Rh factorRh factor
a group of antigens, determined by heredity and usually present in human red blood cells, which may cause hemolytic reactions during pregnancy or after transfusion of blood containing this factor into someone lacking it
Origin of Rh factorfrom rh(esus): from having been discovered first in the blood of rhesus monkeys
Any of several substances on the surface of red blood cells that induce a strong antigenic response in individuals lacking the substance.
Origin of Rh factorRh(esus factor)