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- noun A
classificationof blood that is based on the presence or absence of antigensin the red blood cellsof an individual. For the purposes of blood transfusionthree antigens referred to as "A", "B" and "RhD" (out of a total of 29) are the most important. Based on their presence the human blood can be classified to A, AB, B, and Oblood types which are further divided to Rhpositive or negative.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun human blood cells (usually just the red blood cells) that have the same antigens
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