dubniumPronunciation: /ˈdʌbnɪəm/Definition of dubnium noun [mass noun] the chemical element of atomic number 105, a very unstable element made by high-energy atomic collisions. (Symbol: Db)See also hahnium, joliotium.Origin: 1990s: modern Latin, from Dubna in Russia, site of the Joint Nuclear Institutedubnium in other Oxford dictionaries Definition of dubnium in the US English dictionary
