noun
radioactivity
ray-deer-uuak-TIH-vih-tee
Radioactivity (noun) means the spontaneous release of radiation from unstable atomic nuclei as they break down. Example: “Scientists measured the radioactivity of the soil samples near the plant.”
noun
1
The spontaneous release of radiation from unstable atomic nuclei as they break down.
"Scientists measured the radioactivity of the soil samples near the plant."
How to use radioactivity
Learner’s notesIn plain EnglishThe physical process (or the radiation itself) produced when unstable atomic nuclei decay.
Common pairings
levels of radioactivity
measure radioactivity
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Word forms
- Plural
- radioactivities
Fill the gap
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Scientists measured the _____ of the soil samples near the plant.
Etymology
From "radioactive" plus the noun-forming suffix "-ity".
Synonyms
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Rhymes for radioactivity
See all rhymes for radioactivity →Frequently asked questions
What does “radioactivity” mean?
The word “radioactivity” means the spontaneous release of radiation from unstable atomic nuclei as they break down. In plain terms, the physical process (or the radiation itself) produced when unstable atomic nuclei decay.
How do you pronounce “radioactivity”?
“Radioactivity” is pronounced ray-deer-uuak-TIH-vih-tee (/ˌreɪdɪəʊakˈtɪvɪti/ in IPA).
How do you use “radioactivity” in a sentence?
Here is “radioactivity” used in a sentence: “Scientists measured the radioactivity of the soil samples near the plant.”
What part of speech is “radioactivity”?
“Radioactivity” is a noun.
