un·​nil·​hex·​i·​um ˌyü-nᵊl-ˈhek-sē-əm How to pronounce unnilhexium (audio)

Word History


New Latin, from unnil- (from Latin unus one + nil nothing, zero) + Greek hex six + New Latin -ium — more at one, nil, six

First Known Use

1974, in the meaning defined above

Time Traveler
The first known use of unnilhexium was in 1974

Dictionary Entries Near unnilhexium

Cite this Entry

“Unnilhexium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unnilhexium. Accessed 13 Jul. 2024.

Medical Definition


un·​nil·​hex·​i·​um ˌyün-ᵊl-ˈhek-sē-əm How to pronounce unnilhexium (audio)
: seaborgium
symbol Unh

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