carbon dioxidenoun [ U ]
uk/ˌkɑː.bən daɪˈɒk.saɪd/us/ˌkɑːr.bən daɪˈɑːk.saɪd/symbol CO2B2 the gas formed when carbon is burned, or when people or animals breathe out:
carbon dioxide emissions
More examples
- Plants absorb carbon dioxide during photosynthesis.
- A molecule of carbon dioxide (CO2) has one carbon atom and two oxygen atoms.
- Microbes decompose organic waste into a mixture of methane and carbon dioxide.
- The increased use of natural gas will help reduce carbon dioxide emissions.
- There has been a sudden and worrying rise in the level of carbon dioxide in the atmosphere.
Thesaurus: synonyms and related words
Chemicals, chemical compounds & gases
- acrolein
- adenine
- aldehyde
- alkaline earth metal
- alkane
- ammonia
- ammonium
- ammonium sulphate
- butane
- calcium sulphate
- iodide
- limewater
- lye
- nitrate
- octane
- paraben
- phenolphthalein
- saturated fat
- sodium chloride
- sulphur dioxide
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