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plutonium▼(chemical element)noun[UK: pluː.ˈtəʊ.nɪəm] [US: pluːˈto.ʊ.niəm]
Plutonian▼(of or relating to the dwarf planet Pluto)adjective[UK: pluː.ˈtəʊ.niən] [US: pluːˈto.ʊ.niən]
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