noun
- A radioactive transuranic element.
- synonyms: Rg, element 111, atomic number 111
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). roentgenium. Retrieved September 21, 2026, from http://smartdefine.org/roentgenium/definitions/1247686 |
| Chicago | WordNet. 2010. "roentgenium" http://smartdefine.org/roentgenium/definitions/1247686 (accessed September 21, 2026). |
| Harvard | WordNet 2010, roentgenium, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/roentgenium/definitions/1247686>. |
| MLA | WordNet. "roentgenium" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/roentgenium/definitions/1247686> |