ABO blood group system

(redirected from Type O blood)
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Noun1.ABO blood group system - a classification system for the antigens of human bloodABO blood group system - a classification system for the antigens of human blood; used in blood transfusion therapy; four groups are A and B and AB and O
classification system - a system for classifying things
References in periodicals archive ?
It may be more accurate to say people with type O blood are at a lower risk for pancreatic cancer, given the work researchers from Yale University are doing on bacterial infection.
While receiving blood of the same blood type is best, in an emergency Type O blood can be transfused to people of any blood type.
If blood of type A or B is given to someone with type O blood, for example, the ensuing severe immune reaction can rapidly kill the person.