| group about | (phrv) รวมตัวรอบๆ, Syn. group around, group round |
| ab | (n) the blood group whose red cells carry both the A and B antigens, Syn. type AB, group AB |
| abo blood group system | (n) a classification system for the antigens of human blood; used in blood transfusion therapy; four groups are A and B and AB and O, Syn. ABO group, ABO system |