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swamp gas

noun
1.

marsh gas

noun
1.
a gaseous decomposition product of organic matter, consisting primarily of methane.
Also called swamp gas.
Origin of marsh gas
1775-1785
1775-85, Americanism
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for swamp gas
Historical Examples
  • Yan was certain it could be only an explosion of swamp gas, and forced Pete to swim across by setting the example.

    Two Little Savages Ernest Thompson Seton
British Dictionary definitions for swamp gas

marsh gas

noun
1.
a hydrocarbon gas largely composed of methane formed when organic material decays in the absence of air
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
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swamp gas in Medicine

marsh gas n.
See methane.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Difficulty index for swamp gas

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Word Value for swamp

12
14
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