dioxin
/daɪˈɒksɪn/noun
mass noun
1- a highly toxic compound produced as a by-product in some manufacturing processes, notably herbicide production and paper bleaching. It is a serious and persistent environmental pollutant.二氧（杂）芑, 二英。
1.1
- A heterocyclic organochlorine compound; alternative name: 2,3,7,8-tetrachlorodibenzoparadioxin (abbrev:TCDD); chem. formula: C12H4O2C14.一种杂环有机氯化合物; 又名：2,3,7,8-四氯代二苯并-对-二英; 四氯二苯并对二英（缩略词： TCDD）; 化学分子式：C12H4O2Cl4.
1.2
- count noun any of the class of compounds to which this belongs二氧（杂）芑类化合物
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