Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Any of several immunologically distinct, genetically determined classes of human blood that are based on the presence or absence of certain antigens and are clinically identified by characteristic agglutination reactions. Also called blood type.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A blood type

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. human blood cells (usually just the red blood cells) that have the same antigens

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