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Radiation

Definition(s)

Emission or propagation of electromagnetic energy (waves/rays), or the waves/rays themselves; a stream of electromagnetic particles (electrons, neutrons, protons, alpha particles) or a mixture of these. The most common source is the sun.: Definition from: Unified Medical Language System (MeSH) at the National Library of Medicine
Energy released in the form of particles or electromagnetic waves. Common sources of radiation include radon gas, cosmic rays from outer space, and medical x-rays.: Definition from: Unified Medical Language System (Physician Data Query) at the National Library of Medicine


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