Open main menu

Wiktionary β

Contents

EnglishEdit

EtymologyEdit

radioactive +‎ -ity

NounEdit

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.

Related termsEdit

TranslationsEdit

The translations below need to be checked and inserted above into the appropriate translation tables, removing any numbers. Numbers do not necessarily match those in definitions. See instructions at Wiktionary:Entry layout#Translations.

See alsoEdit

Further readingEdit