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

plural of uranium

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.

(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.

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

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

(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

Uranium-235.

plural of uranium nitride

plural of uranium hexafluoride