Unununium

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    roentgenium. dated, uncountable

Synonyms

All synonyms
eka goldroentgenium

Etymology

Systematic element name, from un- + un- + un- + -ium.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.