Definition of uncontaminated adjective from the Oxford Advanced Learner's Dictionary

 

uncontaminated

 adjective
adjective
BrE BrE//ˌʌnkənˈtæmɪneɪtɪd//
 
; NAmE NAmE//ˌʌnkənˈtæmɪneɪtɪd//
 
 
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not harmed or spoilt by something (for example, dangerous substances) uncontaminated water The equipment is sterilized to ensure that the blood remains uncontaminated. The problems were made worse by the inadequate provision of medical help and uncontaminated milk. opposite contaminate
See the Oxford Advanced American Dictionary entry: uncontaminated