Open English Wordnet
Nouns
(n)rhesus factor, Rh factor, Rha 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
(n)rhodium, Rh, atomic number 45a white hard metallic element that is one of the platinum group and is found in platinum ores; used in alloys with platinum