URANIUM

uranium, atomic number

(noun) a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons

Source: WordNet® 3.1

Etymology

Noun

uranium (countable and uncountable, plural uraniums)

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

Source: Wiktionary

U*ra"ni*um, n. Etym: [NL., from Uranus the planet. See Uranus.] (Chem.)

Definition: 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.

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.

Source: Webster’s Unabridged Dictionary 1913 Edition

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