marsh gas
- a gaseous decomposition product of organic matter, consisting primarily of methane.
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Origin of marsh gas
An Americanism dating back to 1775–85
Also called swamp gas.
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Related Words
methaneExamples from the Web for marsh gas
Historical Examples
Many varieties of coal give off a gas known as marsh-gas or fire-damp.
The Wonder Book of KnowledgeVarious
marsh gas
- a hydrocarbon gas largely composed of methane formed when organic material decays in the absence of air
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
marsh gas
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The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.