Pronunciation: /ˈeɪ.biː.oʊ ˈsɪstəm/
noun a system of blood typing that categorizes blood into four main groups - A, B, AB, and O
A1 The ABO system determines a person's blood type.
A2 Understanding the ABO system is important for blood transfusions.
B1 Doctors use the ABO system to match blood donors with recipients.
B2 The ABO system is based on the presence or absence of antigens on red blood cells.
C1 Research on the ABO system has led to advancements in blood transfusion medicine.
C2 The ABO system is just one part of the complex field of human blood group systems.
formal The ABO system is a classification system used to determine blood type based on the presence or absence of certain antigens.
informal I had to get my blood tested to find out my ABO system, turns out I'm A positive.
slang Dude, do you know your ABO system? I'm O negative, which is pretty rare.
figurative Understanding the ABO system is like decoding a secret language that reveals your blood type.
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