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roentgenium

[ rent-gen-ee-uh m, -jen-, ruhnt- ]
/ rɛntˈgɛn i əm, -ˈdʒɛn-, rʌnt- /

noun Chemistry, Physics.

a superheavy, synthetic radioactive element with a very short half-life. Symbol: Rg; atomic number: 111.

Nearby words

  1. roemer,
  2. roentgen,
  3. roentgen equivalent man,
  4. roentgen ray,
  5. roentgenism,
  6. roentgenize,
  7. roentgeno-,
  8. roentgenogram,
  9. roentgenograph,
  10. roentgenographic

Origin of roentgenium

named after German physicist Wilhelm Konrad Roentgen; see -ium
Formerly unununium, element 111.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019