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

 

methane

 noun
noun
BrE BrE//ˈmiːθeɪn//
 
; NAmE NAmE//ˈmeθeɪn//
 
[uncountable](symbol CH4)
 
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a gas without colour or smell, that burns easily and is used as fuel. Natural gas consists mainly of methane. Word Origin mid 19th cent.: from methyl + -ane.
See the Oxford Advanced American Dictionary entry: methane