Definition of ABO system in English:

ABO system

Syllabification: ABO system


  • A system of four basic types (A, AB, B, and O) into which human blood may be classified, based on the presence or absence of certain inherited antigens.
    More example sentences
    • In the ABO system, the surface antigens of the red cells are determined by three genes, A, B, and O.
    • Blood groups, which are generally classified by the ABO system (so we are all either A, B, O or AB) differ in their distribution in the world.
    • Antibodies with haemolytic properties are common within the ABO system.

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