radioactivity

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See also: radio-activity

English

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Alternative forms

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Etymology

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From radioactive +‎ -ity.

Pronunciation

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Noun

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radioactivity (usually uncountable, plural radioactivities)

  1. Spontaneous emission of ionizing radiation as a consequence of a nuclear reaction, or directly from the breakdown of an unstable nucleus.
  2. The radiation so emitted; including gamma rays, alpha particles, neutrons, electrons, positrons, etc.
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Translations

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See also

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Further reading

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