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Physics. radiation in the form of elementary particles emitted by an atomic nucleus, as alpha rays or gamma rays, produced by decay of radioactive substances or by nuclear fission.


Read Also:

  • Nuclear-reactor

    noun, Physics. 1. (def 4). noun 1. a device in which a nuclear reaction is maintained and controlled for the production of nuclear energy Sometimes shortened to reactor Former name atomic pile See also fission reactor, fusion reactor nuclear reactor A device used to generate power, in which nuclear fission takes place as a controlled […]

  • Nuclear-regulatory-commission

    noun, U.S. Government. 1. an independent agency, created in 1975, that licenses and regulates the nonmilitary use of nuclear energy. Abbreviation: NRC. Nuclear Regulatory Commission (NRC) An agency of the United States government responsible for licensing and regulating nuclear power plants. Created in 1974, along with the Energy Research and Development Administration, it replaced the […]

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