radioactivity
pronunciation
How to pronounce radioactivity in British English:
UK [ˌreɪdiəʊæk'tɪvəti]
How to pronounce radioactivity in American English:
US [ˌreɪdioʊæk'tɪvəti]
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- Noun:
- the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay
Word Origin
- radioactivity (n.)
- 1899, from French radioactivité, coined 1898 by the Curies; see radioactive.
Example
- 1. The worst-case accident would be enormous releases of radioactivity .
- 2. Radioactivity in water has been a mounting concern in japan .
- 3. As a precaution , scientists are monitoring radioactivity in the air .
- 4. After detectors found a small amount of radioactivity , teams searched for 90 days .
- 5. But a shortage of research labs capable of conducting accurate radioactivity tests stalled the process .