marsh gas

noun

: methane

Examples of marsh gas in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Hydrogen sulfide and methane gas rising from the cesspits were known to suddenly burst into flames, not unlike the natural phenomenon of burning marsh gas. — Andrew Coletti, Popular Science, 27 Aug. 2026

Word History

First Known Use

1848, in the meaning defined above

Time Traveler
The first known use of marsh gas was in 1848

Rhymes for marsh gas

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Browse Nearby Words

marsh frog
marsh gas
marsh gentian
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Cite this Entry

“Marsh gas.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/marsh%20gas. Accessed 2 Sep. 2026.

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Kids Definition

marsh gas

noun
: methane

Medical Definition

More from Merriam-Webster on marsh gas

Britannica.com: Encyclopedia article about marsh gas

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