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radioactivity [radioactivities]▼noun[UK: ˌreɪ.dɪəʊæk.ˈtɪ.vɪ.ti] [US: ˌreɪ.dɪo.ʊæk.ˈtɪ.vɪ.ti]
radiation sickness▼noun[UK: ˌreɪ.dɪ.ˈeɪʃ.n̩ ˈsɪk.nəs] [US: ˌre.di.ˈeɪʃ.n̩ ˈsɪk.nəs]
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