[mass noun] The chemical element of atomic number 107, a very unstable element made by high-energy atomic collisions.
- ‘In 1997, however, the name bohrium for element 107 was recognized internationally.’
- ‘Only a few atoms of bohrium have ever been made, and it will probably never be isolated in observable quantities.’
- ‘The element bohrium was first identified on February 24, 1981.’
- ‘Few atoms have ever been made, but if enough were found in one area, bohrium would constitute a radiation hazard.’
- ‘This is because bohrium decays very rapidly through the emission of particles.’
- ‘Due to its extremely short half-life, there's no reason for considering the effects of bohrium in the environment.’