rhesus factor


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rhesus factor:

see Rh factorRh factor,
protein substance present in the red blood cells of most people, capable of inducing intense antigenic reactions. The Rh, or rhesus, factor was discovered in 1940 by K. Landsteiner and A. S.
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rhesus factor

[′rē·səs ‚fak·tər]
(immunology)