ROENTGENIUM Meaning of ROENTGENIUM in English roentgenium BrE AmE ˌrɒnt ˈdʒiːn i‿əm ˌrəʊnt-, ˌrʌnt-, -ˈɡiːn- AmE \ ˌroʊnt- rent- Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012