n. An inflammable gas (mostly methane) found in coal mines; forms an explosive mixture with air.
the GNU version of the Collaborative International Dictionary of English
n. a damp consisting chiefly of light carbureted hydrogen; -- so called from its tendence to explode when mixed with atmospheric air and brought into contact with flame.
n. See under Damp.
n. a mixture of gases (mostly methane) that forms in coal mines and becomes explosive when mixed with air. It is a source of serious hazard in coal mining operations.
The Century Dictionary and Cyclopedia
n. The gas contained in coal, often given off by it in large quantities, and exploding, on ignition, when mixed with atmospheric air.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a mixture of gases (mostly methane) that form in coal mines and become explosive when mixed with air
Word Usage
"A continuous struggle against the dangers of landslips, fires, inundations, explosions of firedamp, like claps of thunder."