Any fuel used to power aircraft, such as avgas or jet fuel.

A radioactive material, such as uranium, used to power a nuclear reactor.

plural of aviation fuel

A reactor fuel containing relatively little plutonium and thus not lending itself to weaponisation.

plural of caramel fuel

plural of nuclear fuel

A combustion fuel that is theoretically environmentally friendly and is carbon neutral. A range of combustibles that is produced by combining hydrogen from water with atmospheric carbon dioxide using renewable energy sources to make the fuels.

Fuel, usually in the form of briquettes, made from fine, crushed coal with the addition of a binding agent.

(informal) Something capable of inducing nightmares, often by being highly disturbing.

The amount of combustible material present in a natural environment; a measurement of this.