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blood typing

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noun Physiology.
  1. the process of classifying blood into blood groups, based on laboratory tests to reveal the presence or absence of particular antigens on the surface of red blood cells.

Origin of blood typing

First recorded in 1925–30
Also called blood grouping.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
blood typing in Medicine

blood typing

n.
  1. blood grouping