decontamination
noun/ˌdiːkənˌtæmɪˈneɪʃn/
/ˌdiːkənˌtæmɪˈneɪʃn/
[uncountable]- the process of removing harmful substances from a place or thing
- the decontamination of water supplies
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decontamination
Definition of decontamination noun from the Oxford Advanced Learner's Dictionary