\ˈe͡ɪpɪstəsi], \ˈe‍ɪpɪstəsi], \ˈeɪ_p_ɪ_s_t_ə_s_i]\
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1894 - The Clarendon dictionary
By William Hand Browne, Samuel Stehman Haldeman
1919 - The Concise Standard Dictionary of the English Language
By James Champlin Fernald

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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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