Unrefined oil; as it is found underground, consisting mainly of hydrocarbons.

The peak of the Earth's oil production.

A dark yellow, acrid oil, obtained from the seeds of plants of the genus Croton, once used as a drastic purgative.

A paint in which the colours or pigments are suspended in an oil-based carrier such as linseed oil which hardens on exposure to the air.

A volatile oil, used to make perfumes and flavourings, especially one having the characteristic odour of the plant from which it is obtained.

An oil used not for lubrication but as a component of another material, or as a carrier of other products.

The pale yellow vegetable oil extracted from the castor bean; used as a laxative and an industrial lubricant.

The hot pungent oil expressed from mustard seeds; used sparingly as a food dressing. / (organic chemistry) The essential oil allyl isothiocyanate, also obtained from mustard seeds.

An industrial process plant where crude oil is processed and refined into useful petroleum products

An area under which are reserves of petroleum, especially one with productive oil wells.