Definition of hydrocarbon noun from the Oxford Advanced Learner's Dictionary

 

hydrocarbon

 noun
noun
BrE BrE//ˌhaɪdrəˈkɑːbən//
 
; NAmE NAmE//ˌhaɪdrəˈkɑːrbən//
 
(chemistry)
 
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a chemical made up of hydrogen and carbon only. There are many different hydrocarbons found in petrol/gas, coal and natural gas. a cut in hydrocarbon emissions from motor vehicles
See the Oxford Advanced American Dictionary entry: hydrocarbon