Meanings
noununtriennium (uncountable)
- uncountableThe systematic element name for the chemical element with atomic number 139 (symbol Ute).
Origin
Systematic element name, from un- + tri- + enn- + -ium.
Full word history & related roots →Cite this entry
APA
untriennium. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/untriennium
MLA
“untriennium.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/untriennium. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “untriennium,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/untriennium.
Source: untriennium on Wiktionary, CC BY-SA 4.0.