English

Definition of carbon dioxide noun from the Oxford Advanced Learner's Dictionary

 

carbon dioxide

 noun
noun
BrE BrE//ˌkɑːbən daɪˈɒksaɪd//
 
; NAmE NAmE//ˌkɑːrbən daɪˈɑːksaɪd//
 
[uncountable] (symbol CO2) Waste and pollution
 
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a gas breathed out by people and animals from the lungs or produced by burning carbon See related entries: Waste and pollutionExtra examples Coke burns with oxygen to give carbon dioxide. How is carbon dioxide formed? Trees absorb carbon dioxide and produce oxygen.
See the Oxford Advanced American Dictionary entry: carbon dioxide