Word.ws English Dictionary

CO₂

/si.oʊ.tu/

CO₂ noun: carbon dioxide.

Noun

CO₂ (uncountable)

  1. carbon dioxide.
    • By swapping out less efficient federal vehicles for new hybrid and fuel efficient ones, this strategy will reduce gasoline consumption by 1.3 million gallons per year and prevent 26 million pounds of CO₂ from entering the atmosphere.2009 April 9, Office of the Press Secretary, “President Obama Announces Accelerated Purchase of 17,600 New American Vehicles for Government Fleet”, in White House, archived from the original on 10...
    • On aviation, the Chancellor seemed to suggest it was open season for expanding airports across the UK, irrespective of the fact that flying is a major source of CO² in the atmosphere.2025 February 19, Christian Wolmar, “Reeves talks of 'growth' but pays lip service to the railway”, in RAIL, number 1029, page 35

Synonyms of CO₂

Words formed from CO₂

Phrases with CO₂

Questions about CO₂

What does CO₂ mean?
CO₂ means carbon dioxide.
What part of speech is CO₂?
CO₂ is a noun.
How do you pronounce CO₂?
CO₂ is pronounced /si.oʊ.tu/.

Words near CO₂ in the dictionary

  1. Coșești
  2. Coșna
  3. Coșteiu
  4. Coșula
  5. Coțofănești
  6. CO₂
  7. CO₂ offset
  8. CO₂ offsets
  9. CO₂-eq.
  10. CO₂e
  11. cp

Source and license

Adapted from Wiktionary: CO₂ (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “CO₂.” Word.ws, https://word.ws/co%E2%82%82. Based on Wiktionary, CC BY-SA 4.0.