A long zirconium tube, filled with pellets of uranium oxide, stacked in bundles inside a nuclear reactor as fuel.

A grade of oil used principally as a fuel. / Specifically, the heaviest commercial fuel that can be obtained from crude oil.

plural of jet fuel

A measure of the amount of fuel consumed in a car or other vehicle based on the distance traveled.

plural of caramel fuel

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

(chiefly UK, Ireland, New Zealand) The inability of a household to keep adequately warm at a reasonable cost.

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.

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

plural of bunker fuel