noun
- A radioactive element of the alkali-metal group discovered as a disintegration product of actinium.
- synonyms: Fr, atomic number 87
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). francium. Retrieved September 20, 2026, from http://smartdefine.org/francium/definitions/1247637 |
| Chicago | WordNet. 2010. "francium" http://smartdefine.org/francium/definitions/1247637 (accessed September 20, 2026). |
| Harvard | WordNet 2010, francium, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/francium/definitions/1247637>. |
| MLA | WordNet. "francium" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/francium/definitions/1247637> |