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(Elements & Compounds) petroleum before it has been refined
petroleum as it comes from the ground, before refining.
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|Noun||1.||crude oil - a dark oil consisting mainly of hydrocarbons|
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
fossil fuel - fuel consisting of the remains of organisms preserved in rocks in the earth's crust with high carbon and hydrogen content
oil - a slippery or viscous liquid or liquefiable substance not miscible with water