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| pe·tro·le·um [ pə trṓlee əm ] |
noun |
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| Definition: |
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crude oil found in rock: crude oil that occurs naturally in sedimentary rocks and consists mainly of hydrocarbons. A wide variety of commercially important petrochemicals, including gasoline and kerosene, are derived from it.
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| [Early 16th century. < medieval Latin< Latin petra "stone, rock" + oleum "oil"] |
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