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actinium meaning in Czech

EnglishCzech
actinium (chemical element)
noun
[UK: æk.ˈtɪ.nɪəm]
[US: æk.ˈtɪ.niːəm]

aktiniumnoun
{n}

protactinium (chemical element)
noun
[UK: ˌprəʊ.tæk.ˈtɪ.niəm]
[US: ˌproʊ.tæk.ˈtɪ.niəm]

protaktiniumnoun