marsh gas
noun/ˈmɑːʃ ɡæs/
/ˈmɑːrʃ ɡæs/
[uncountable]- the gas methane, especially when it is produced in a marsh when plants decay (= become destroyed by natural processes)
Definitions on the go
Look up any word in the dictionary offline, anytime, anywhere with the Oxford Advanced Learner’s Dictionary app.
Check pronunciation:
marsh gas