| slovo | definícia |
uranium
(encz) | uranium,uran [chem.] fikus |
Uranium
(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 |
uranium
(wn) | uranium
n 1: 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] |
uranium
(elements) | uranium
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.
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| | podobné slovo | definícia |
uranium 235
(encz) | uranium 235, n: |
uranium 238
(encz) | uranium 238, n: |
uranium ore
(encz) | uranium ore, n: |
Uranium
(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 |
uranium 235
(wn) | uranium 235
n 1: a uranium isotope with mass number 235; capable of
sustaining chain reactions |
uranium 238
(wn) | uranium 238
n 1: the commonest isotope of uranium; it is not fissionable but
when irradiated with neutrons it produces fissionable
plutonium 239 |
uranium ore
(wn) | uranium ore
n 1: any ore from which uranium can be extracted |
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