Synonym for radiotherapy ... <oncology> The treatment of disease by ionising radiation. ... Origin: Gr. Therapeia = cure ... (18 Nov 1997) ... 
Type: Term Pronunciation: rent′gen-ō-ther′ă-pē Definitions: 1. Obsolete term for radiotherapy.
radiotherapy, roentgenotherapy 1. The medical specialty concerned with the use of electromagnetic or particulate radiation in the treatment of disease. 2. The treatment of disease by means of X-rays or other forms of ionizing radiation.roentgenotherapy, roentgentherapy Radiotherapy, the treatment of disease by particle application, as of x-ray photons, nuclear disintegrations, or ultraviolet radiation.