scotch asphodel: false asphodel having spikes of white flowers; of mountainous regions of Europe
false asphodel: a plant of the genus Tofieldia having linear chiefly basal leaves and small spicate flowers
rhesus factor: 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