\ʌnpɹɪpˈe͡ədnəs], \ʌnpɹɪpˈe‍ədnəs], \ʌ_n_p_ɹ_ɪ_p_ˈeə_d_n_ə_s]\
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1874 - Etymological and pronouncing dictionary of the English language
By Stormonth, James, Phelp, P. H.

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Nuclear Fissions

  • Nuclear reaction in which the nucleus of heavy atom such as uranium plutonium is split into two approximately equal parts by a neutron, charged particle, or photon.
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