1974, in the meaning defined above
New Latin, from unnil- (from Latin unus one + nil nothing, zero) + Greek hex six + New Latin -ium — more at one, nil, six
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Cite this Entry
“Unnilhexium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unnilhexium. Accessed 25 Oct. 2021.
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