Definition: Isohemagglutinins are antibodies against blood group antigens, usually of the IgM isotype. People with type O blood will have isohemagglutinin titers against both type A and B blood groups but those with type AB blood have neither.
[iso- + G. haima, blood, + L. ad, to, + gluten, glue]
See Also: isoagglutination
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