blood group

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blood group

any one of the various groups into which human blood is classified on the basis of its agglutinogens
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

blood group

[′bləd ‚grüp]
(immunology)
An immunologically distinct, genetically determined class of human erythrocyte antigens, identified as A, B, AB, and O. Also known as blood type.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.