C0440700 (kō′kär-sĭn′ə-jən, kō-kär′sĭn-ə-jĕn′)n. A substance or factor that will not promote cancer by itself but can potentiate cancer when acting with carcinogenic agents.co·car′cin·o·gen′ic(-sə-nə-jĕn′ĭk) adj.
cocarcinogenic
(ˌkəʊkɑːˈsɪnəˌdʒɛnɪk; ˌkəʊˈkɑːsɪnəˌdʒɛnɪk) adjof or relating to a cocarcinogenEncyclopediaSeecocarcinogen