| azonic | (adjective) not restricted to any particular zone or region | - |
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| diazonium | (noun) the univalent cation R-N:N- (where R is an aromatic hydrocarbon); found in salts that are used in manufacturing azo dyes | - |
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| ozonide | (noun) any of a class of unstable chemical compounds resulting from the addition of ozone to a double bond in an unsaturated compound | - |
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| ozonise | (verb) convert (oxygen) into ozone | Synonyms: ozonize |
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| ozonize | (verb) convert (oxygen) into ozone | Synonyms: ozonise |
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| zoning | (noun) dividing an area into zones or sections reserved for different purposes such as residence and business and manufacturing etc | - |
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