|Compare chemotherapy 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|
|(used as a nonsense word by children to express approval or to represent the longest word in English.)|
|given to using long words.|
radiotherapy ra·di·o·ther·a·py (rā'dē-ō-thěr'ə-pē)
Treatment of disease with radiation, especially by selective irradiation with x-rays or other ionizing radiation and by ingestion of radioisotopes.