radioactivity
noun#22,375
Translations
- 放射能ほうしゃのう
- 人工放射能じんこうほうしゃのう
- 比放射能ひほうしゃのう
- 放射能量ほうしゃのうりょう
English definition
- the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay
Examples
- The radioactivity leaked out of the nuclear power plant.
- As time passed, the radioactivity diminished.