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