a radioactive chemical element with a very short half-life: a transactinide produced by bombarding bismuth with high-energy nuclear particles: symbol, Mt; at. no. 109
Origin of meitneriumModL, after Meitner + -ium
An artificially produced radioactive element with atomic number 109 that has known isotopes with mass numbers ranging from 265 to 279. The isotope with the longest confirmed half-life (0.7 seconds) is Mt-268. See Periodic Table.
Origin of meitneriumAfterLise Meitner
- A transuranic chemical element (symbol Mt) with atomic number 109.
Named for Lise Meitner