radiotherapyEnglishOxford New American Dictionaryradiotherapy /ˌrādēōˈTHerəpē, ˌreɪdioʊˈθɛrəpi / ▸ noun another term for radiation therapy. – DERIVATIVES radiotherapeutic /ˌrādēōˌTHerəˈpyo͞odik, ˌreɪdioʊˌθɛrəˈpjudɪk / adjective,radiotherapist /ˌrādēōˈTHerəpəst, ˌreɪdioʊˈθɛrəpəst / noun