unnilhexium

[ yoo-nil-hek-see-uh m ]
/ ˌyu nɪlˈhɛk si əm /

noun Chemistry, Physics.

former name of seaborgium. Symbol: Unh
Also called element 106.

Origin of unnilhexium

1975–80; < Latin ūn(us) one + nīl nothing + Greek héx six + New Latin -ium -ium

Words nearby unnilhexium

unnamed, unnatural, unnecessary, unnerve, unnilennium, unnilhexium, unniloctium, unnilpentium, unnilquadium, unnilseptium, unnoticeable

Definition for unnilhexium (2 of 3)

seaborgium
[ see-bawr-gee-uh m, see-bawr- ]
/ siˈbɔr gi əm, ˈsi bɔr- /

noun Chemistry, Physics.

a superheavy, synthetic, radioactive element with a very short half-life. Symbol: Sg; atomic number: 106.
Formerly unnilhexium, element 106.

Origin of seaborgium

named after U.S. chemist Glenn T. Seaborg; see -ium

Definition for unnilhexium (3 of 3)

element 106

noun Chemistry, Physics.

seaborgium.
Formerly unnilhexium.

Origin of element 106

First recorded in 1975–80

British Dictionary definitions for unnilhexium

seaborgium
/ (ˈsiːbɔːɡɪəm) /

noun

a synthetic transuranic element, synthesized and identified in 1974. Symbol: Sg; atomic no: 106

Word Origin for seaborgium

C20: named after Glenn Seaborg

Scientific definitions for unnilhexium

seaborgium
[ sē-bôr′gē-əm ]

Sg

A synthetic, radioactive element that is produced by bombarding californium with oxygen ions or bombarding lead with chromium ions. Its most long-lived isotopes have mass numbers 259, 261, 263, 265, and 266 with half-lives of 0.9, 0.23, 0.8, 16, and 20 seconds, respectively. Atomic number 106. See Periodic Table.