2004, in the meaning defined above
New Latin; from the fact that the element was synthesized on the centennial of Röntgen's discovery of X-rays
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Cite this Entry
“Roentgenium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/roentgenium. Accessed 28 Sep. 2021.
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