| NOUN | substance | sulphur dioxide, sulfur dioxide | a colorless toxic gas (SO2) that occurs in the gases from volcanoes |
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| Meaning | 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. | |
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| Synonym | sulfur dioxide | |
| Broader | dioxide | An oxide containing two atoms of oxygen in the molecule |
| gas | A fluid in the gaseous state having neither independent shape nor volume and being able to expand indefinitely | |
| pollutant | waste matter that contaminates the water or air or soil | |
| Spanish | dióxido de azufre, dióxido de sulfuro | |
| Catalan | diòxid de sofre, diòxid de sulfur | |
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