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.
&fist; 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.
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.
&fist; 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.
