radioactivity
Spontaneous emission of ionizing radiation as a consequence of a nuclear reaction, or…Spontaneous emission of ionizing radiation as a consequence of a nuclear reaction, or directly from the breakdown of an unstable nucleus.
» 'Radioactivity' is a chemical term.
"Radioaktivität" ist ein chemischer Begriff.
"Радіоактивність" - хімічний термін.
Meaning
2 senses(uncountable, usually)Spontaneous emission of ionizing radiation as a consequence of a nuclear reaction, or directly from the breakdown of an unstable nucleus.
Radioaktivität
радиоакти́вностьradioaktívnostʹ
радіоактивністьradioaktyvnistʹ
the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay
(uncountable, usually)The radiation so emitted; including gamma rays, alpha particles, neutrons, electrons, positrons, etc.
Radioaktivität
радиоакти́вностьradioaktívnostʹ
радіоакти́вністьradioaktývnistʹ
Examples
9 sentences'Radioactivity' is a chemical term.
"Радіоактивність" - хімічний термін.
de"Radioaktivität" ist ein chemischer Begriff.
'Radioactivity' is a chemistry term.
"Радіоактивність" - хімічний термін.
ru"Радиоактивность" - это химический термин.
de"Radioaktivität" ist ein chemischer Begriff.
As time passed, the radioactivity diminished.
ruСо временем радиоактивность снизилась.
How dangerous are the levels of radioactivity?
The radioactivity leaked out of the nuclear power plant.
Translations
8 languagesBy meaning 2
By meaning 1
By meaning 1
Origin
From radioactive + -ity or radio- + activity.From radioactive + -ity or radio- + activity.
Wiktionary, CC BY-SA 4.0 · source
Forms
plural: radioactivitiesSynonyms
1 synonyms- the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay:radiation
Word family
10 related wordsLessons for this word
1 lessons- A1Countable and uncountable nouns — Because it can be uncountable