an asphyxiating mixture of gases remaining in a mine after a fire or an explosion of firedamp, usually consisting mostly of nitrogen and carbon dioxide
An asphyxiating mixture of gases, primarily nitrogen and carbon dioxide, left in a mine after a fire or an explosion.
Origin of afterdampafter damp gas
- (mining) Suffocating gases present in a coal mine after an explosion caused by firedamp, consisting of nitrogen, carbon monoxide, carbon dioxide, and sometimes hydrogen sulfide.
From after- + damp.