radiation therapy radiation syndrome • radiational · · · Info · Definitions · Synonyms · Characters · · radiation therapy · · Text Common · · Latin · · Scripts 17 · · Length 7 · · Syllables Definitions · · · (noun) (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance. Synonyms: radiotherapy, radiation therapy, radiation, actinotherapy, irradiation. · · Noun Definition 1 Synonyms · · · radiotherapy · · Synonym 1 radiation · · Synonym 2 actinotherapy · · Synonym 3 irradiation · · Synonym 4 Characters · · space U+0020 a latin small letter a U+0061 d latin small letter d U+0064 e latin small letter e U+0065 h latin small letter h U+0068 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 t latin small letter t U+0074 y latin small letter y U+0079