'Uranium' definitions:

Definition of 'uranium'

From: WordNet
noun
A heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons [syn: uranium, U, atomic number 92]

Definition of 'Uranium'

From: GCIDE
  • Uranium \U*ra"ni*um\, n. [NL., from Uranus the planet. See Uranus.] (Chem.) An element of the chromium group, found in certain rare minerals, as pitchblende, uranite, etc., and reduced as a heavy, hard, nickel-white metal which is quite permanent. Its yellow oxide is used to impart to glass a delicate greenish-yellow tint which is accompanied by a strong fluorescence, and its black oxide is used as a pigment in porcelain painting. Symbol U. Atomic weight 239. [1913 Webster]
  • Note: Uranium was discovered in the state of an oxide by Klaproth in 1789, and so named in honor of Herschel's discovery of the planet Uranus in 1781. [1913 Webster] Uran-ocher

Definition of 'Uranium'

From: Elements
  • Symbol: U
  • Atomic number: 92
  • Atomic weight: (231)
  • White radioactive metallic element belonging to the actinoids. Three natural isotopes, U-238, U-235 and U-234. Uranium-235 is used as the fuel for nuclear reactors and weapons. Discovered by Martin H. Klaproth in 1789.

Words containing 'Uranium'