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... > substance > chemical substance > chemical compound > natural resource > fossil fuel > oil > petroleum
... > substance > chemical > chemical compound > natural resource > fossil fuel > oil > petroleum
... > substance > chemical substance > compound > natural resource > fossil fuel > oil > petroleum
... > substance > chemical > compound > natural resource > fossil fuel > oil > petroleum

Preferred term

petroleum  

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  • http://www.irandoc.ac.ir/onto/irandoc-meta/Concept

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Definitions

  • Petroleum or crude oil is a naturally occurring, flammable liquid found in rock formations in the Earth consisting of a complex mixture of hydrocarbons of various molecular weights, plus other organic compounds. [Wikipedia]

Obsolete

  • false

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http://www.irandoc.acir/onto/irandoc/SWEETT00060

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