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Definition of hydrocarbon noun from the Oxford Advanced American Dictionary

 

hydrocarbon

 noun
noun
NAmE//ˈhaɪdrəˌkɑrbən//
 
, NAmE//ˌhaɪdrəˈkɑrbən//
 
(chemistry)
 
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a chemical made up of hydrogen and carbon only. There are many different hydrocarbons found in petroleum, coal, and natural gas. a cut in hydrocarbon emissions from motor vehicles
See the Oxford Advanced Learner's Dictionary entry: hydrocarbon