- A classification system for man bloodstream that identifies four significant bloodstream kinds based on the existence or absence of two antigens, A and B, on red blood cells. The four blood types (A, B, AB, and O, where O designates bloodstream that lacks both antigens) are important in identifying the compatibility of blood for transfusion.
- a classification system the antigens of man bloodstream; used in bloodstream transfusion therapy; four teams tend to be A and B and AB and O
Hypernym for "ABO system"
- classification system
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