Added 9 October 2026 chemotherapy /ˌkiːməʊˈθɛɹəpi/ noun Categories: ActionsUncommon Words noun ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about chemotherapy at Wordnik → Where our words come from → The use of chemical agents to treat or control disease (or mental illness). Related Words: neoadjuvantpharmacotherapychemotherapeuticchemochemicalchemotherapeuticsantineoplasticsoncotherapyquimiotherapychemodrugchemotherapeutantchemoagent Back to today's word