rock oil

Found in Anh - Anh (Wordnet)

Definition Noun : * A dark, viscous liquid mixture of hydrocarbons found naturally in geological formations beneath the Earth's surface; crude oil. It is a fossil fuel formed from the remains of ancient marine organisms and is the raw material for producing gasoline, diesel, and many other petrochemical products. Usage Examples Noun : The country's economy depends heavily on the export of rock...