ABO system

noun
\ ˌā-(ˌ)bē-ˈō- \

Definition of ABO system 

: the basic system of antigens of human blood behaving in heredity as an allelic unit to produce any of the ABO blood groups

First Known Use of ABO system

1938, in the meaning defined above

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The first known use of ABO system was in 1938

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ABO system

noun
\ ˌā-(ˌ)bē-ˈō- \

Medical Definition of ABO system 

: the basic system of antigens of human blood behaving in heredity as an allelic unit to produce any of the ABO blood groups

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