1. 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 blood group system, ABO system, ABO group]
WordNet (r) 3.0 (2006):
ABO system
n 1: 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 blood group system, ABO system,
ABO group]