Definition of uncontaminated adjective from the Oxford Advanced American Dictionary

 

uncontaminated

 adjective
adjective
NAmE//ˌʌnkənˈtæməˌneɪt̮əd//
 
 
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not harmed or spoiled by something (for example, dangerous substances) uncontaminated water
See the Oxford Advanced Learner's Dictionary entry: uncontaminated