marsh gas
Also found in: Dictionary, Thesaurus, Medical, Legal, Wikipedia.
marsh gas
a hydrocarbon gas largely composed of methane formed when organic material decays in the absence of air
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
marsh gas
[′märsh ‚gas] (geochemistry)
Combustible gas, consisting chiefly of methane, produced as a result of decay of vegetation in stagnant water.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.