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English definition of “radiotherapy”

radiotherapy

noun [U] uk   /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 disease
(Definition of radiotherapy from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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