Oxford Dictionary English chemotherapy nounnoun BrE BrE//ˌkiːməʊˈθerəpi// ; NAmE NAmE//ˌkiːmoʊˈθerəpi// (informal chemo) [uncountable] Conventional medicine Add to my wordlistjump to other resultsthe treatment of disease, especially cancer, with the use of chemical substances a course of chemotherapy compare radiation, radiotherapy Wordfindercurechemotherapy, cure, disease, drug, injection, medication, osteopathy, palliative, physiotherapy, radiotherapy Oxford Collocations DictionaryChemotherapy is used before these nouns: regimen See full entry See related entries: Conventional medicineSee chemotherapy in the Oxford Advanced American DictionaryCheck pronunciation: chemotherapy oxfordlearnersdictionaries.com