rhesus factor | sense examples, Usage and Definition from wordnet dictionary online

Noun rhesus factor has 1 sense

rhesus factor, Rh factor, Rh - 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
--₁ is a kind of antigen