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English definition of “radiotherapy”

radiotherapy

noun [U]     /ˌreɪ.di.əʊˈθer.ə.pi/ US  /-oʊ-/
the use of controlled amounts of radiation (= a form of energy) aimed at a particular part of the body, to treat diseaseMedicine in different forms
(Definition of radiotherapy noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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