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Irradiation
Pronunciation
Definition 1
The use of high-energy radiation from x-rays, gamma rays, neutrons, protons, and other sources to kill cancer cells and shrink tumors. Radiation may come from a machine outside the body (external-beam radiation therapy), or it may come from radioactive material placed in the body near cancer cells (internal radiation therapy). Systemic irradiation uses a radioactive substance, such as a radiolabeled monoclonal antibody, that travels in the blood to tissues throughout the body. Also called radiation therapy and radiotherapy. (NCI Dictionary)
Definition 2
Treatment with radiation, generally meaning exposure to ionizing radiation or radiation of wavelengths shorter than those of visible light. (NCI Thesaurus)
Definition 3
Treated with radiation. (NCI Dictionary)
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