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che·mo·ra·dio·ther·a·py | \ -ˌrād-ē-ō-ˈther-ə-pē 
\
\Medical Definition of chemoradiotherapy
: treatment that combines chemotherapy and radiotherapy Concomitant chemoradiotherapy is an attractive option for the treatment of head and neck cancer. In concomitant chemoradiotherapy, chemotherapy is used primarily to sensitize tumor cells to radiation therapy and increase locoregional control.— Everett E. Vokes, Scientific American Medicine, November 2000
— called also chemoradiation
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