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 It has been used for decades to treat patients undergoing chemotherapy and radiotherapy for cancer. Scientific American, "The Potential Hazards Of Personalized Medicines," 10 Dec. 2019 The 53-year-old turned at first to radiotherapy, the hospital said. Author: Hannah Knowles, Anchorage Daily News, "Watch this woman play her violin in the middle of brain surgery," 20 Feb. 2020 Hunt is currently waiting for new dentures to be made, after radiotherapy destroyed his natural teeth. Fox News, "Eye cancer misdiagnosed as migraine left giant hole in man's face," 7 May 2018 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

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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Time Traveler for radiotherapy

Time Traveler

The first known use of radiotherapy was in 1902

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Statistics for radiotherapy

Cite this Entry

“Radiotherapy.” Dictionary, Merriam-Webster, Accessed 6 Aug. 2020.

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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

More from Merriam-Webster on radiotherapy Encyclopedia article about radiotherapy

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