noun
- A radioactive isotope of strontium (with the mass number 90) that is present in the fallout from nuclear explosions; can be assimilated like calcium into bones. .
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). strontium 90. Retrieved September 21, 2026, from http://smartdefine.org/strontium_90/definitions/1247697 |
| Chicago | WordNet. 2010. "strontium 90" http://smartdefine.org/strontium_90/definitions/1247697 (accessed September 21, 2026). |
| Harvard | WordNet 2010, strontium 90, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/strontium_90/definitions/1247697>. |
| MLA | WordNet. "strontium 90" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/strontium_90/definitions/1247697> |