Advertisement
Advertisement
radioactivity
[ rey-dee-oh-ak-tiv-i-tee ]
noun
- the phenomenon, exhibited by and being a property of certain elements, of spontaneously emitting radiation resulting from changes in the nuclei of atoms of the element.
radioactivity
/ ˌreɪdɪəʊækˈtɪvɪtɪ /
noun
- the spontaneous emission of radiation from atomic nuclei. The radiation can consist of alpha, beta, and gamma radiation
radioactivity
/ rā′dē-ō-ăk-tĭv′ĭ-tē /
- The emission of radiation by unstable atomic nuclei undergoing radioactive decay .
radioactivity
- The emission of elementary particles by some atoms when their unstable nuclei disintegrate ( see half-life ). Materials composed of such atoms are radioactive. ( See alpha radiation , beta radiation , and gamma radiation .)
Discover More
Word History and Origins
Origin of radioactivity1
Discover More
A Closer Look
Discover More
Example Sentences
Speculation: The scorch might have been made by radioactivity attendant upon the resurrection.
This new virus strain was accidentally produced in the course of some experiments with radioactivity.
Twenty minutes after the irradiation period, the radioactivity of the calcium standards is measured by the same instrument.
Later on, radioactivity from silver (silver-110m) can be measured using a longer counting time.
Since the atomic wars, the increased radioactivity of the earth undoubtedly stimulates mitosis of the malignant cells.
Traces of natural radioactivity can be found, in fact, in all substances on earth.
Advertisement
Advertisement
Advertisement
Advertisement
Browse