noun
- A radioactive metallic element that is similar to tellurium and bismuth; occurs in uranium ores but can be produced by bombarding bismuth with neutrons in a nuclear reactor.
- synonyms: Po, atomic number 84
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| MLA | WordNet. "polonium" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/polonium/definitions/1247677> |