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Radioactivity   /rˈeɪdioʊæktˈɪvəti/  /rˌeɪdioʊæktˈɪvəti/   Listen
Radioactivity

noun
1.
The spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay.  Synonym: radiation.



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"Radioactivity" Quotes from Famous Books



... the phenomena bound up with radioactivity, which were discovered in direct consequence of Crookes's work. We know that the naturally radioactive elements are all in the group of those with the highest atomic weight. This fact, seen together with the characteristics of radioactivity, ...
— Man or Matter • Ernst Lehrs

... causing a burning sensation and damage on skin or tissue] cauterizer^; caustic, lunar caustic, alkali, apozem^, moxa^; acid, aqua fortis [Lat.], aqua regia; catheretic^, nitric acid, nitrochloro-hydric acid, nitromuriatic acid; radioactivity, gamma rays, alpha particles, beta rays, X-rays, radiation, cosmic radiation, background radiation, radioactive isotopes, tritium, uranium, plutonium, radon, radium. sunstroke, coup de soleil [Fr.]; insolation. [artifacts requiring heat in their manufacture] pottery, ceramics, crockery, ...
— Roget's Thesaurus of English Words and Phrases: Body • Roget

... contagious disease similar in symptoms to bubonic plague, but responding to none of the treatments for this latter disease. This new virus strain was accidentally produced in the course of some experiments with radioactivity. ...
— Operation R.S.V.P. • Henry Beam Piper

... only lightly to begin with, because she hadn't taken any precautions—because we who've escaped hot death against all reasonable expectations by virtue of some incalculable resistance to the ills of radioactivity, quite often find we've escaped sterility too. If she should become pregnant, she was telling herself, then she had a real sticky business ahead of her where no man could be trusted for ...
— The Night of the Long Knives • Fritz Reuter Leiber

... The second discovery, associated with the Curies, is that of the peculiar properties exhibited by the impure substance, and due to a constituent named radium. The investigation of this substance and its properties (see RADIOACTIVITY) has proceeded so far as to render it probable that the theory of the unalterability of elements, and also the hitherto accepted explanations of various celestial phenomena—the source of solar energy and the appearances of the tails ...
— Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 - "Chtelet" to "Chicago" • Various



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