Definition of dubnium in English:


(also Db)


mass noun
  • The chemical element of atomic number 105, a very unstable element made by high-energy atomic collisions.

    • ‘Following up on berkelium, dubnium and californium, researchers at the University of Berkely in California, stumbled upon am element with atomic number 117 about a year ago.’
    • ‘For instance, after five alpha particles have been emitted we are left with element 105, which is called dubnium.’
    • ‘Similar controversies attended the much more recent synthesis and naming of the heaviest element of the group, dubnium.’
    • ‘Nine isotopes of Dubnium are now recognized.’


1990s modern Latin, from Dubna in Russia, site of the Joint Nuclear Institute.