define radiology oncology
Synonym(s): radiotherapy, therapeutic radiology. radiation oncology. n. The branch of radiology that deals with the use of ionizing radiation to treat cancers. radiation oncology. the study of the treatment of cancer with ionizing radiation. radiation oncology Oncology The specialty of medicine that uses high-energy ionizing radiation to treat malignant neoplasms and certain nonmalignant conditions Modalities Teletherapy, brachytherapy, hyperthermia, stereotactic radiation. See Oncology, Surgical oncology. McGraw-Hill Concise Dictionary of Modern Medicine.