- Types:
- show 8 types...
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coal
fossil fuel consisting of carbonized vegetable matter deposited in the Carboniferous period
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gas, natural gas
a fossil fuel in the gaseous state; used for cooking and heating homes
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crude, crude oil, fossil oil, oil, petroleum, rock oil
a dark oil consisting mainly of hydrocarbons
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anthracite, anthracite coal, hard coal
a hard natural coal that burns slowly and gives intense heat
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bituminous coal, soft coal
rich in tarry hydrocarbons; burns readily with a smoky yellow flame
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brown coal, lignite, wood coal
intermediate between peat and bituminous coal
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steam coal
coal suitable for use under steam boilers
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resid, residual oil
oil products that remain after petroleum has been distilled
