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Neptunian▼(of or pertaining to the Roman god Neptune)adjective[UK: nep.ˈtjuː.njən] [US: nep.ˈtuː.niːən]
neptunium▼(chemical element)noun[UK: nep.ˈtjuː.niəm] [US: nep.ˈtuː.niəm]
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