Synonym: radiation. Similar words: radioactive, activity, inactivity, objectivity, productivity, connectivity, conductivity, collectivity. Meaning: ['reɪdɪəʊək'tɪvətɪ] 
n. the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay.
n. the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay. 
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1. A dangerous amount of radioactivity was released into the environment last month.
2. We have to learn to control radioactivity.
3. The Geiger counter registered a dangerous level of radioactivity.
4. The amounts of radioactivity present were infinitesimal.
5. The site was found to be contaminated by radioactivity.
6. The accident caused the release of radioactivity into the atmosphere.
7. The level of radioactivity in the soil was found to be above recommended limits.
7. Sentencedict.com try its best to collect and make good sentences.
8. According to received wisdom, exposure to low level radioactivity is harmless.
9. Hot spots of radioactivity were found near the power station.
10. The government claims that background radioactivity is well below international norms.
11. He says there's more radioactivity in the environment.
12. As the uranium reacts its radioactivity produces unstable atoms.
13. Workers were exposed to high levels of radioactivity.
14. One curie is equal to the radioactivity of one gram of radium.
15. The radioactivity to which they were exposed was so powerful that the dead men's bodies were themselves a radiation hazard.
16. Analysis of the radioactivity within the seaweed indicates that it had been discharged from Sellafield within the past 12 months or so.
17. Researchers, however, are less concerned about radioactivity than the toxic nature of depleted uranium, a heavy metal.
18. Strong traces of radioactivity were discovered in the tombs, which is credited with having arrested dissolution.
19. Only 10 years after the discovery of radioactivity, the first rocks were dated by the uranium-lead method.
20. Both radioactive fission products and induced radioactivity in structural materials contribute to the problem of radioactive waste.
21. The soil contains 30 times the acceptable level of radioactivity.
22. The dismantling of a nuclear reprocessing plant caused a leak of radioactivity yesterday.
23. They argued that only a negligible rise in atmosphere radioactivity resulted from the test.
24. That upsets some anti-nuclear activists, who claim that a rocket explosion could spew cancer-causing radioactivity into the atmosphere.
25. It was quite a shock when 400 square metres of the site was found to be contaminated by radioactivity.
26. The addition of indomethacin resulted in a significant decrease in the radioactivity ratio between ulcerated and intact mucosa.
27. The carrier, glowing through the night with its immense burden of radioactivity, is too hot to handle.
28. Two other canisters bearing labels for radioactive material were also found, but preliminary tests failed to detect any radioactivity.
29. Projects already undertaken for pharmaceutical customers have involved removal of plant and equipment contaminated with low-levels of radioactivity and other hazardous materials.
30. The abundance of the new elements can then be analyzed by their radioactivity.
More similar words: radioactive, activity, inactivity, objectivity, productivity, connectivity, conductivity, collectivity, proactive, festivity, creativity, retroactive, sensitivity, activist, retroactively, judicial activism, radio wave, radio telescope, declivity, proclivity, aggressivity, contradiction, active, actively, inactive, activate, reactive, attractive, deactivate, reactivate.