radiotherapy

American  

[ray-dee-oh-ther-uh-pee] / ˌreɪ di oʊˈθɛr ə pi /

noun

Medicine/Medical.

1. treatment of disease by means of x-rays or of radioactive substances.

---

radiotherapy British  

/ ˌreɪdɪəʊˈθɛrəpɪ /

noun

1. the treatment of disease, esp cancer, by means of alpha or beta particles emitted from an implanted or ingested radioisotope, or by means of a beam of high-energy radiation Compare chemotherapy

---

Other Word Forms

• radiotherapist
  noun
• radiotherapeutic
  adjective
• radiotherapeutically
  adverb

---

Etymology

Origin of radiotherapy

First recorded in 1900–05; radio- + therapy

---

Example Sentences

See Examples For:

radiotherapy

"I had to have radiotherapy twice and that's left me with instant early menopause, lymphoedema and nerve damage."

From BBC ● Oct. 19, 2026

For the current trial, researchers are studying controlled release niacin given alongside recommended chemotherapy and radiotherapy.

From Science Daily ● Oct. 4, 2026

She initially underwent a lumpectomy, then a mastectomy, as well as eight rounds of chemotherapy and radiotherapy.

From BBC ● Sep. 17, 2026

Walters, who hails from New Zealand, underwent several unsuccessful rounds of chemotherapy, radiotherapy and immunotherapy in Auckland.

From The Wall Street Journal ● Sep. 7, 2026

Its effects became even stronger when researchers combined it with chemotherapy, radiotherapy or immunotherapy.

From Science Daily ● Aug. 19, 2026

Random Word

Spin the wheel and learn a new word!

---