petroleum

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See also: Petroleum

English[edit]

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Etymology[edit]

From Medieval Latin petroleum, from petra (rock) + oleum (oil).

Pronunciation[edit]

  • (file)

Noun[edit]

petroleum (plural petroleums or petrolea)

  1. A flammable liquid ranging in color from clear to very dark brown and black, consisting mainly of hydrocarbons, occurring naturally in deposits under the Earth's surface.

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