a blood group classifying whether the substances called Rhesus (Rh) factors are present on the surface of red blood cells; the 'positive' or 'negative' designation in blood classification (for example, 'O negative') Found on https://www.encyclo.co.uk/local/20875
a blood group classifying whether the substances called Rhesus (Rh) factors are present on the surface of red blood cells; the 'positive' or 'negative' designation in blood classification (for example, 'O negative')