Dictionary > English Dictionary > Definition, synonym and antonym of radioactivity
Meaning of radioactivity by Wiktionary Dictionary

radioactivity


    Etymology

    radioactive +‎ -ity

    Noun

    radioactivity ( 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 terms

    See also

    External links

    • Radioactive decay on Wikipedia .


Explanation of radioactivity by Wordnet Dictionary

radioactivity


    Noun
    1. the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay