roentgenium

 
Pronunciation: /rʌntˈdʒɛnɪum, rəːnt-, rɒnt-, -ˈgɛn-/

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)