che·mo ‧ ther ‧ a ‧ py /ˌkiːməʊˈθerəpi, ˌke- $ -moʊ-/ BrE AmE noun [uncountable]
[ Date: 1900-2000 ; Origin: chemo- 'chemical' (from Modern Latin , from Late Greek chemeia 'alchemy' , probably from chyma 'liquid' , from chein 'to pour' ) + therapy ]
the use of drugs to control and try to cure ↑ cancer ⇨ radiotherapy