carbon monoxide
nounUK /ˌkɑːbən məˈnɒksaɪd/
US /ˌkɑːrbən məˈnɑːksaɪd/
A gas with no color or smell that comes from burning things and is dangerous to breathe.
The fire alarm also warns us if carbon monoxide is in the house.
RELATED WORDS
OTHER MEANINGS
2. A poisonous gas made of one carbon atom and one oxygen atom, often produced by car engines and heaters.
Never run a car in a closed garage because of carbon monoxide.
3. A common air pollutant that can harm people and animals when it builds up indoors.
The detector beeped to show high carbon monoxide levels.
4. A chemical compound used in industry to make other chemicals.
Factories use carbon monoxide to help produce certain fuels.