Meaning of “carbon monoxide” - Learner’s Dictionary

carbon monoxide

noun [ U ] uk us /ˌkɑːbənməˈnɒksaɪd/

B2 a poisonous gas that is produced by burning some types of fuel, especially petrol (= fuel for cars) (formula CO)

(Definition of “carbon monoxide” from the Cambridge Learner’s Dictionary © Cambridge University Press)