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
WordReference Random House Learner's Dictionary of American English © 2025
ra•di•o•ther•a•py /ˌreɪdioʊˈθɛrəpi/USA pronunciation
n. [uncountable]
WordReference Random House Unabridged Dictionary of American English © 2025- Medicinethe treatment of disease by means of x-rays or radioactive substances.
ra•di•o•ther•a•py
(rā′dē ō ther′ə pē),USA pronunciation n. [Med.]
ra′di•o•ther′a•pist, n.
- Medicinetreatment of disease by means of x-rays or of radioactive substances.
- radio- + therapy 1900–05
Collins Concise English Dictionary © HarperCollins Publishers::
'radiotherapy' also found in these entries (note: many are not synonyms or translations):
actinotherapy
- brachytherapy
- caesium
- chemotherapy
- cobalt
- cobalt 60
- cobalt bomb
- gold
- milligram-hour
- phosphorus
- radiation therapy
- radio
- radium
- radium sulfate
- radon
- ray
- technetium