sulphur dioxide sulphur-crested cockatoo • sulphur dye · · · Info · Definitions · Synonyms · Characters · · sulphur dioxide · · Text Common · · Latin · · Scripts 15 · · Length 4 · · Syllables Definitions · · · (noun) a colorless toxic gas (SO2) that occurs in the gases from volcanoes; used in many manufacturing processes and present in industrial emissions; causes acid rain. Synonyms: sulfur dioxide, sulphur dioxide. · · Noun Definition 1 Synonyms · · · sulfur dioxide · · Synonym 1 Characters · · space U+0020 d latin small letter d U+0064 e latin small letter e U+0065 h latin small letter h U+0068 i latin small letter i U+0069 l latin small letter l U+006C o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 s latin small letter s U+0073 u latin small letter u U+0075 x latin small letter x U+0078