(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
[重整旗鼓, chóng zhěng qí gǔㄔㄨㄥˊ ㄓㄥˇ ㄑㄧˊ ㄍㄨˇ] lit. to reorganize flags and drums (成语 saw); to regroup after a setback; to prepare for new initiatives; to attempt a comeback#58501