Definition of dioxin in English:



mass noun
  • 1A 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.

    A heterocyclic organochlorine compound; alternative name: 2,3,7,8-tetrachlorodibenzoparadioxin(abbreviation TCDD); chemical formula: C₁₂H₄O₂Cl₄

    • ‘Activists also charge that inappropriate operation of incinerators creates not only air pollution but also toxic dioxin.’
    • ‘The Jiading factory will be able to burn at 850 degrees centigrade, hot enough to destroy dioxin, a poisonous chemical compound found in some waste, said the engineer on that project.’
    • ‘Some commentators recommend avoiding fatty fish because more PCBs, DDT, dioxin, and other chemical compounds will be found in the fat.’
    • ‘In addition, the manufacture and incineration of PVC releases dioxin, a known human carcinogen, into the environment.’
    • ‘He discussed how the manufacture of PVC creates the unwanted byproduct of dioxin, a potent carcinogen.’
    • ‘That view is shared by the usually mild US Environmental Protection Agency following their extensive three-year study that proved dioxin to be more toxic than had originally been believed.’
    • ‘The Stockholm Convention, to which Australia is a signatory, bans, or seeks to eliminate 12 of the worst organic pollutants including dioxin.’
    • ‘Arsenic and dioxin in the herbicides are expected to pose a health threat long into the future.’
    • ‘No trees will be cut for Whole Earth and no chlorine used in paper making (thus releasing no dioxin into the environment).’
    • ‘The amounts of dioxin in the environment are very low.’
    • ‘A 1995 study shows that the amount of dioxin produced during waste incineration depends more on the method of incineration than on the chlorine content of the waste.’
    • ‘Thousands of ducks and a million duck eggs have been destroyed after the toxic chemical dioxin was found in eggs at a supermarket, the government said yesterday.’
    • ‘But until two years ago, the pleasures of Zamami were spoiled by the presence of a garbage incinerator that spewed highly toxic dioxin into the atmosphere.’
    • ‘Some of the herbicide contained dioxin, one of the world's deadliest poisons.’
    • ‘Poly-vinyl chloride, or PVC, is targeted as a primary producer of dioxin.’
    • ‘Cigarettes contain many pesticide residues, some chlorine chemicals that when burned produce dioxin, a known human carcinogen and cause of a host of diseases.’
    • ‘The pulp and paper industry has historically discharged dioxin and other environmental toxins into rivers and streams.’
    • ‘But dioxin and related toxic chemicals are detectable in the body years after exposure.’
    • ‘FDA has since recommended that clays used as desiccants in feed processing be tested for dioxin.’
    • ‘The by-product of this process, dioxin, is thought to be linked to cervical cancer and also has harmful effects on the environment.’
    1. 1.1count noun Any of the class of compounds to which dioxin belongs.
      • ‘Exposure to dangerous chemicals called dioxins can cause a rare form of acne called chloracne.’
      • ‘What if there's a level of dioxins, like TCDD in that?’
      • ‘He said that when you burn any organic matter, which contains chlorine and organic carbon, you get dioxins.’
      • ‘Other residents will just burn the rubbish in their garden spreading dioxins and other noxious chemicals throughout the countryside.’
      • ‘They have excavated more than 100,000 cubic metres of fill contaminated with heavy metals, hydrocarbons and dioxins.’


Early 20th century: from di- ‘two’ + ox- ‘oxygen’ + -in.