ra·​dio·​ther·​a·​py | \ ˌrā-dē-ō-ˈther-ə-pē How to pronounce radiotherapy (audio) \

Definition of radiotherapy

: the treatment of disease with radiation (such as X-rays)

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Other Words from radiotherapy

radiotherapist \ ˌrā-​dē-​ō-​ˈther-​ə-​pist How to pronounce radiotherapist (audio) \ noun

Examples of radiotherapy in a Sentence

Recent Examples on the Web

The latest medical technology advances in cancer radiotherapy that Symon discussed are aimed to improve the treatment of prostate, colon and pancreatic cancers. Sergio Carmona,, "Israeli advances in radiation oncology presented to South Floridians," 28 June 2019 The hospitals wanted me to have chemotherapy, radiotherapy. Kat Bein, Billboard, "Hannah Wants Talks New Music & Overcoming Health Battle: 'It Turned My Life Upside Down'," 20 June 2019 Similarly, the radiotherapy that could cure her lymphatic cancer couldn't be performed because her weakened lungs and heart would likely fail. Fox News, "Woman diagnosed with 2 terminal illnesses given 6 months to live," 2 May 2018 There should be more options than chemotherapy and radiotherapy. Fox News, "Mom battling rare cancer in race against time to create memories with toddler son," 16 May 2018 Because chemotherapy and radiotherapy can make one sterile, women can freeze their eggs before treatment, the BBC reported. Amy Lieu, Fox News, "Human eggs grown in lab for first time, creating hope for young females with cancer," 15 Mar. 2018 Both medical imaging and radiotherapy are mainstays of global health care, and their consistent application saves lives every day. John Ericson, Newsweek, "Death Rays," 2 Apr. 2014 Today radiotherapy is considerably safer for its practitioners and more beneficial to its recipients. The Economist, "Knives, beams, drugs and antibodiesToday’s anti-cancer tools are ever better wielded," 14 Sep. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'radiotherapy.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of radiotherapy

1902, in the meaning defined above

History and Etymology for radiotherapy

International Scientific Vocabulary

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Statistics for radiotherapy

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Time Traveler for radiotherapy

The first known use of radiotherapy was in 1902

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More Definitions for radiotherapy


ra·​dio·​ther·​a·​py | \ ˌrād-ē-ō-ˈther-ə-pē How to pronounce radiotherapy (audio) \
plural radiotherapies

Medical Definition of radiotherapy

: the treatment of disease by means of radiation (as X-rays)

called also radiation therapy, radium therapy

— compare radiodiagnosis

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Comments on radiotherapy

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concealment of treason or felony

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