marsh gas

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Origin of marsh gas

An Americanism dating back to 1775–85
Also called swamp gas. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for marsh gas

marsh gas

  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

marsh gas in Medicine

marsh gas

  1. methane
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.