rhesus factor is a noun meaning "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". It carries one recorded sense.
Definitions, synonyms and semantic relations for rhesus factor come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.