sulfur dioxide
English Thesaurus
1. 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 (noun.substance)
| hypernym | : | dioxide, |
| definition | : | an oxide containing two atoms of oxygen in the molecule (noun.substance) |
| hypernym | : | pollutant, |
| definition | : | waste matter that contaminates the water or air or soil (noun.substance) |
| hypernym | : | gas, |
| definition | : | a fluid in the gaseous state having neither independent shape nor volume and being able to expand indefinitely (noun.substance) |
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