sulphur dioxide

A form of sulfur dioxide — A toxic gas, of molecular formula SO₂ that is found in the emissions of volcanos and those of burning coal or petroleum; dissolves in water to form sulfurous acid and, in the presence of oxygen, sulfuric acid, and is thus responsible for acid rain.

Similar
E220 when used as a food preservativesulfur dioxide
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Meanings

nounsulphur dioxide (uncountable)
  1. UKalternativeuncountablechemistryAlternative spelling of sulfur dioxide.

    Synonyms: E220 when used as a food preservative

Synonyms & antonyms

More synonyms by meaning

nouna colorless toxic gas (SO2) that occurs in the gases from volcanoes; used in many manufacturing processes and present in industrial emissions; causes acid rain

Similar
sulfur dioxide
Broader
dioxidegas
Also see
sulfur dioxide

Synonym sets from Open English WordNet, CC BY 4.0.

Cite this entry
APA

sulphur dioxide. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/sulphur%20dioxide

MLA

“sulphur dioxide.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/sulphur%20dioxide. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “sulphur dioxide,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/sulphur%20dioxide.

Source: sulphur dioxide on Wiktionary, CC BY-SA 4.0.