Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun atomic_number_109

1 sense of atomic number 109

Sense 1
meitnerium, Mt, element 109, atomic number 109 -- (a radioactive transuranic element)
       => chemical element, element -- (any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter)