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radiation
[ rey-dee-ey-shuhn ]
noun
- Physics.
- the process in which energy is emitted as particles or waves.
- the complete process in which energy is emitted by one body, transmitted through an intervening medium or space, and absorbed by another body.
- the energy transferred by these processes.
- the act or process of radiating.
- something that is radiated.
- radial arrangement of parts.
radiation
/ ˌɪɪˈɪʃə /
noun
- physics
- the emission or transfer of radiant energy as particles, electromagnetic waves, sound, etc
- the particles, etc, emitted, esp the particles and gamma rays emitted in nuclear decay
- Also calledradiation therapy med treatment using a radioactive substance
- anatomy a group of nerve fibres that diverge from their common source
- the act, state, or process of radiating or being radiated
- surveying the fixing of points around a central plane table by using an alidade and measuring tape
radiation
- Streams of photons, electrons, small nuclei, or other particles. Radiation is given off by a wide variety of processes, such as thermal activity, nuclear reactions (as in fission), and by radioactive decay.
- The emission or movement of such particles through space or a medium, such as air.
- The use of such energy, especially x-rays, in medical diagnosis and treatment.
radiation
- Energy sent out in the form of particles or waves . ( See alpha radiation , beta radiation , blackbody , cosmic rays , electromagnetic radiation , fluorescence , gamma radiation , photon , and quanta .)
Derived Forms
- ˌ徱ˈپDzԲ, adjective
Other Word Forms
- d·tDz· adjective
- t·d·tDz adjective
- t·d·tDz noun
- ԴDzr·徱·tDz noun
Word History and Origins
Origin of radiation1
Example Sentences
People living near a US airbase earmarked to house nuclear weapons say they are being left in the dark about what would happen in the event of a radiation alert.
There is plenty of evidence that that foods can be successfully grown from cells on Earth, but can the process be repeated in the weightlessness and higher radiation of space?
When most people think about cancer, they imagine the physical toll that it takes: weeks of chemo or radiation treatment, or multiple surgeries and visits to various specialists.
Comparisons have often been made with the Ukrainian city of Pripyat, abandoned after the 1986 explosion at the Chernobyl nuclear plant led to a huge radiation leak.
And working on her will is in line with what Teddi Mellencamp, who is getting radiation and immunotherapy, told Us Weekly earlier this month.
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