carcinogenic /ˌkɑː(ɹ)sɪnəˈd͡ʒɛnɪk/adjective 1noun 1forms 3 adjective1 •Causing or tending to cause cancer.The disadvantage of the underfired grill is the potential for flareups, which can cause a burned spot or carbonization. Not only do these taste bad, but they are also carcinogenic. — 2009 noun1 •Synonym of carcinogen. formscarcinogenics · more carcinogenic · most carcinogenic