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Definition of Uranium
U`ra´ni`um | n. | 1. | (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. <-radioactive, U-235 isotope is used in atomic fission, in bombs or power plants -> |
Related Words
atomic number 92, metal, metallic element, pitchblende, U, uraninite, uranium 235, uranium 238
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