Petroleum
Pronunciation: /pəˈtroʊliːəm/
Petroleum (noun)
- A thick, dark liquid found underground, used to make fuels and other products.
- A major source of energy for vehicles and machines, derived from natural resources.
Examples
- Petroleum is extracted from deep underground reservoirs.
- Many vehicles rely on petroleum as their primary fuel source.
Common collocations: crude petroleum, petroleum industry, renewable petroleum, petroleum products