Noun Concept
Categories: Wikipedia articles incorporating a citation from the New International Encyclopedia, Wikipedia articles incorporating a citation from the 1911 Encyclopaedia Britannica with Wikisource reference, All articles containing potentially dated statements, Coal mining, Articles with excerpts
coal  coal industry
Coal is a combustible black or brownish-black sedimentary rock, formed as rock strata called coal seams. Wikipedia
Hazardous waste byproducts such as fly ash that are produced by coal-fired power plants Wikipedia Disambiguation
Combustible rock Wikidata
Industry related with the technical and mechanical activity of removing coal from the earth and preparing it for market. OmegaWiki
The natural, rocklike, brown to black derivative of forest-type plant material, usually accumulated in peat beds and progressively compressed and indurated until it is finally altered in to graphite-like material. OmegaWiki
A black rock formed from prehistoric plant remains, composed largely of carbon and burned as a fuel. Wiktionary
Uncountable: carbon rock. Wiktionary (translation)
Put some coal on the fire. Wiktionary