roentgeniumPronunciation: /rʌntˈdʒɛnɪum, rəːnt-, rɒnt-, -ˈgɛn-/Definition of roentgenium 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)roentgenium in other Oxford dictionaries Definition of roentgenium in the US English dictionary
