Definition of uranium Uranium

/jɚejˈniʌm/ - [yereyneeum] - u•ra•ni•um

We found 6 definitions of uranium from 6 different sources.

What does uranium mean?

WordNet

Noun Plural: uraniums
uranium - a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons
		U, atomic number 92
		metallic element, metal any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
		pitchblende, uraninite a mineral consisting of uranium oxide and trace amounts of radium and thorium and polonium and lead and helium; uraninite in massive form is called pitchblende which is the chief uranium ore
		uranium 235 a uranium isotope with mass number 235; capable of sustaining chain reactions

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Wiktionary

uranium (Noun)
The element with atomic number 92 and symbol U.

Webster DictionaryWebster's Unabridged Dictionary 📘

uranium (n.)
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.

OmegaWiki DictionaryOmegaWiki Dictionary Ω

uranium
A metallic element highly toxic and radioactive; used as nuclear fuel.\nSymbol: U, atomic number: 92.

Wikipedia

Uranium is a chemical element (a metal) on the periodic table. It has an atomic number of 92. It is a very heavy element, with a very large nucleus in its center. The nucleus of a certain isotope of uranium (known as uranium-235) can be easily split into two piece after absorbing a neutron, which is known as nuclear fission. This gives off a lot of energy, and is used in both nuclear reactors and nuclear weapons. Another isotope of uranium (known as uranium-238) can absorb neutrons and turn into plutonium, which is also useful in reactors and nuclear weapons. Over 99% of uranium in nature is uranium-238, and it is very expensive and difficult to separate the less than 1% of the uranium-235 from this.

Uranium is weakly radioactive. Uranium which has had all of its uranium-235 separated from it is called depleted uranium, and is used for bomb casings because it is very heavy and thick. Uranium can also be used as a dye for glass or pottery, which is how it was used before people found out that it was radioactive and could be used for nuclear things.

To make nuclear explosions. A nuclear explosion is made by separating the atoms in the substance. The uranium bomb, called Fat man, was used to bomb Nagasaki, unfortunately incinerating many people and buildings. The good part was this ended World War II. Uranium is a dangerous substance. The symbol for uranium is three triangles in an odd formation, as shown in a capsule in the picture to the left.