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fuel oil

noun
1.
an oil used for fuel, especially one used as a substitute for coal, as crude petroleum.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for fuel-oil

fuel oil

noun
1.
a liquid petroleum product having a flash point above 37.8°C: used as a substitute for coal in industrial furnaces, domestic heaters, ships, and locomotives
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Encyclopedia Article for fuel-oil

fuel oil

fuel consisting mainly of residues from crude-oil distillation. It is used primarily for steam boilers in power plants, aboard ships, and in industrial plants. Commercial fuel oils usually are blended with other petroleum fractions to produce the desired viscosity and flash point. Flash point is usually higher than that of kerosene. The term fuel oil ordinarily does not include such fuels as kerosene.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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