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radiation science definition
- a. 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.b. The emission or movement of such particles through space or a medium, such as air. See Notes at conduction, electromagnetic radiation.
- The use of such energy, especially x-rays, in medical diagnosis and treatment.
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