| NOUN | substance | carbon dioxide, CO2, carbonic acid gas | a heavy odorless colorless gas formed during respiration and by the decomposition of organic substances |
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| Meaning | A heavy odorless colorless gas formed during respiration and by the decomposition of organic substances; absorbed from the air by plants in photosynthesis. | |
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| Synonyms | CO2, carbonic acid gas | |
| Narrower | chokedamp, blackdamp | The atmosphere in a mine following an explosion |
| Broader | dioxide | An oxide containing two atoms of oxygen in the molecule |
| greenhouse gas, greenhouse emission | A gas that contributes to the greenhouse effect by absorbing infrared radiation | |
| Spanish | anhídrido carbónico, bióxido de carbono, CO2, dióxido de carbono | |
| Catalan | CO2, diòxid de carboni | |
| Verbs | carbonate | treat with carbon dioxide |
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