blood group

blood group (blud grldbomacp)

1. an erythrocytic allotype (or phenotype) defined by one or more cellular antigenic groupings controlled by allelic genes. Numerous blood group systems are now known, the most widely used in matching blood for transfusion being the ABO and Rh groups.

2. any of various other characteristics or traits of cellular or fluid components of blood, considered as the expression (phenotype or allotype) of the actions and interactions of dominant genes, and useful in medicolegal and other studies of human inheritance.

---

blood group

n.

1. Any of several immunologically distinct, genetically determined classes of human blood that are based on the presence or absence of certain antigens, are clinically identified by characteristic agglutination reactions, and are important with respect to blood transfusions and organ transplantation.

2. Blood type.

---

blood group,

n classification based on the presence of certain antigens on the surface of red blood cells. Types include A, B, AB, O, and Rh+ or Rh−. Used in organ tranplantation, trans-fusion therapy, genetic studies, and maternal-fetal compatibility testing.

---

blood group

the phenotype of erythrocytes defined by one or more cellular antigenic structural groupings under the control of allelic genes. The identification of specific blood groups is little used in veterinary medicine, except for the identification of parents, usually in horses and farm animals, and for purposes of selecting blood donors. For blood transfusions the usual practice is to carry out direct matching tests to avoid problems created by incompatibility. For blood group systems, see Table 7.