radiotherapy

Treatment of disease with radiation, especially by selective irradiation with x-rays or other ionizing radiation and by ingestion of radioisotopes.

Treatment of disease by any of the forms of radioactivity.

Treatment of disease by means of x-rays or radioactivity. Radiotherapy of cancer is based on the fact that cancer cells are more sensitive to radiation than most other cells in the body.

The therapeutic use of ionizing radiation, almost exclusively used for the treatment of malignant disease.

(medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance