unnilhexium
noun
un·nil·hex·i·um ˌyü-nᵊl-ˈhek-sē-əm 
: seaborgium
Word History
Etymology
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
Medical Definition
unnilhexium
noun
un·nil·hex·i·um ˌyün-ᵊl-ˈhek-sē-əm
: seaborgium —symbol Unh