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


carbon monoxide

BrE BrE//ˌkɑːbən mənˈɒksaɪd//
; NAmE NAmE//ˌkɑːrbən mənˈɑːksaɪd//
[uncountable] (symbol CO)
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a poisonous gas formed when carbon burns partly but not completely. It is produced when petrol/gas is burnt in car engines.
See the Oxford Advanced American Dictionary entry: carbon monoxide