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

1 sense of roentgenium

Sense 1
roentgenium, Rg, element 111, atomic number 111 -- (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)

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