a blood group antigen possessed by Rh-positive people; if
an Rh-negative person receives a blood transfusion from an Rh-positive person it can result in hemolysis and anemia Synonym(s):rhesus factor, Rh factor, Rh
a white hard metallic element that is one of the platinum group and is found in platinum ores; used in alloys with platinum Synonym(s):rhodium, Rh, atomic number 45