crossmatching

noun
cross·match·ing | \ ˈkrȯ-ˈsmach-iŋ \
variants: or crossmatch \-ˈsmach \

Medical Definition of crossmatching 

: the testing of the compatibility of the bloods of a transfusion donor and a recipient by mixing the serum of each with the red cells of the other to determine the absence of agglutination reactions

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to deposit or conceal in a hiding place

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