found: Wikipedia, Apr. 22, 2009(blood type (also called a blood group) is a classification of blood based on the presence or absence of inherited antigenic substances on the surface of red blood cells (RBCs); these antigens may be proteins, carbohydrates, glycoproteins, or glycolipids, depending on the blood group system)
found: MESH browser, Apr. 22, 2009(Blood Group antigens; UF; Blood Groups; Blood Grouping and Crossmatching, UF: Blood typing)
found: American heritage dict. of the Engl. lang., via WWW, Apr. 22, 2009(blood type; see blood group; also called: blood type)
