Word.ws English Dictionary

radioactivities

radioactivities is the plural of radioactivity.

Meaning of radioactivity

Noun

radioactivity (usually uncountable, plural radioactivities)

  1. (usually) Spontaneous emission of ionizing radiation as a consequence of a nuclear reaction, or directly from the breakdown of an unstable nucleus.
    • Today, no one would intentionally smear radioactive materials on their face, but in 1933, the dangers of radioactivity were not yet fully understood.2020 March 8, Jacopo Prisco, “When beauty products were radioactive”, in CNN
  2. (usually) The radiation so emitted; including gamma rays, alpha particles, neutrons, electrons, positrons, etc.

Questions about radioactivities

What is radioactivities the plural of?
Radioactivities is the plural of radioactivity.

Words near radioactivities in the dictionary

  1. radioactive tracer
  2. radioactive tracers
  3. radioactive waste
  4. radioactively
  5. radioactives
  6. radioactivities
  7. radioactivity
  8. radioadaptation
  9. radioadaptations
  10. radioadaptative
  11. radioadaptive

Source and license

Adapted from Wiktionary: radioactivities (page history and authors); radioactivity (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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