Coal-oil meaning

A flammable hydrocarbon oil that is distilled from bituminous coal and is used as a fuel for lamps.
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Kerosene or any other oil obtained by fractional distillation of petroleum.
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Crude petroleum.
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Unrefined oil, obtained by destructive distillation of coal: used as a lamp fuel.
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(regional) Kerosene or any unspecified lower grade derivative of crude petroleum.
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