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|Noun||1.||wood coal - intermediate between peat and bituminous coal|
coal - fossil fuel consisting of carbonized vegetable matter deposited in the Carboniferous period
humate - material that is high in humic acids
jet - a hard black form of lignite that takes a brilliant polish and is used in jewelry or ornamentation
|2.||wood coal - a carbonaceous material obtained by heating wood or other organic matter in the absence of air|
atomic number 6, carbon, C - an abundant nonmetallic tetravalent element occurring in three allotropic forms: amorphous carbon and graphite and diamond; occurs in all organic compounds
fuel - a substance that can be consumed to produce energy; "more fuel is needed during the winter months"; "they developed alternative fuels for aircraft"