Definition of roentgenium in English:

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roentgenium

Pronunciation: /rəːntˈɡɛnɪəm/
/rʌntˈdʒɛnɪəm/
/rɒntˈɡɛnɪəm/

noun

The chemical element of atomic number 111, a radioactive element produced artificially. (Symbol: Rg)

Origin

Early 21st century: named after Wilhelm Conrad Röntgen (see roentgen).

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