From Longman Dictionary of Contemporary Englishcoal gasˈcoal gas noun [uncountable] TPGgas produced by burning coal, used especially for electricity and heating → natural gas
Examples from the Corpus
coal gas• I vividly recall the smell of damp wool and coal gas, which was unlike anything I'd experienced before.• Murdock's investigations of coal gas were a direct result of his search for materials to preserve the bottom of ships.• And the smell of coal gas forces residents to wear make-shift masks.• He was also first in his use of coal gas for train lighting in 1862.• Meanwhile the manager had started to put coal gas into the other, oxygen, bag.• He was also the first person to use coal gas for lighting purposes.• It was also while Murdock was living in Redruth that he started his experiments with coal gas. 