Rh

n 1: 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

[syn: {rhesus factor}, {Rh factor}, {Rh}]

2: a white hard metallic element that is one of the platinum

group and is found in platinum ores; used in alloys with

platinum [syn: {rhodium}, {Rh}, {atomic number 45}]