cross-contamination

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cross-contam·in·ation

BrE

/ˌkrɒs kənˌtæmɪˈneɪʃn/

NAmE

/ˌkrɔːs kənˌtæmɪˈneɪʃn/

noun

[uncountable]

the process by which harmful bacteria spread from one substance to another （病菌的）交叉污染