Roentgenium

//ɹɛntˈɡɛniəm// noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A transuranic chemical element (symbol Rg) with atomic number 111. uncountable
  2. 2
    a radioactive transuranic element, with atomic number 111 wordnet

Synonyms

All synonyms
atomic number 111eka goldeka-goldelement 111rgunununium

Etymology

From Roentgen + -ium. Named after Wilhelm Roentgen.

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