ABO blood group
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Related to ABO blood group: Rh blood group
ABO blood group[ā·bē′ō ′bləd ‚grüp]
An immunologically distinct, genetically determined group of human erythrocyte antigens represented by two blood factors (A and B) and four blood types (A, B, AB, and O).
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.