chemotherapeutic adjective 1noun 1forms 1 adjective1 •Of or having to do with chemotherapy.But for a vast majority of cancers, more intensive regimens of standard chemotherapeutic drugs did not necessarily mean more survival. — 2010 noun1 •A chemical agent used in chemotherapySeveral novel chemotherapeutics that target specific signaling pathways are now available as anti-cancer agents including EGFR inhibitors and rapamycin. — 2005 formschemotherapeutics