The element with atomic number 92 and symbol U: a radioactive silvery-grey metal in the actinide series.

plural of uranium

Uranium-235.

plural of uranium hexafluoride

plural of uranium nitride

(chemistry, military) Uranium enriched with a higher than normal amount of the fissile isotope U-235; used in nuclear reactors and nuclear weapons.

Uranium that contains a reduced (depleted) amount of the fissile isotope U-235 compared to natural uranium; it is used in applications where the nuclear properties of the uranium are not important, and the uranium is instead being used for its mechanical or chemical properties.

(chemistry) an insoluble binary compound or uranium and nitrogen, (UN)ₙ, used as fuel rods in nuclear reactors

(chemistry) a binary compound of uranium and fluorine, UF₆; it is a grey solid, or heavy gas, and is used in the uranium enrichment process to produce fuel for nuclear reactors or nuclear weapons

(physics) A fissile isotope of uranium, used for energy generation and in atomic weapons, containing one hundred and forty-three neutrons. It has a half-life of 7·038×10⁸ years; it decays into thorium-231 and ultimately lead.