marsh gas
noun
1.
a gaseous decomposition product of organic matter, consisting primarily of methane.
Also called
swamp gas
.
Origin
1775-85,
Americanism
Examples from the web for
marsh gas
Well, a crowd gathered round and a scientist said it was
marsh gas
.
Also called
marsh gas
, methane is a colorless, odorless gas.
We always thought it was
marsh gas
or phosphorus but some believed that the lights were spirits or fairies, good or bad.
British Dictionary definitions for
marsh gas
marsh gas
noun
1.
a hydrocarbon gas largely composed of methane formed when organic material decays in the absence of air
marsh gas
in Medicine
marsh gas
n.
See
methane
.