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Definition of dioxin noun from the Oxford Advanced Learner's Dictionary

 

dioxin

 noun
noun
BrE BrE//daɪˈɒksɪn//
 
; NAmE NAmE//daɪˈɑːksɪn//
 
 
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a chemical used in industry and farming. Most dioxins are poisonous. Word Origin early 20th cent.: from di- ‘two’ + ox- ‘oxygen’ + -in.
See the Oxford Advanced American Dictionary entry: dioxin