Home › Words › T › teratocarcinomateratocarcinomateratocarcinoma means A malignant tumor, most often found in the testes.Among words judged in Lexicurio's Arena, teratocarcinoma ranks #42,036 of 42,749 for Qualifying.EtymologyFrom terato- + carcinoma.nounA malignant tumor, most often found in the testes.Definitions & examples from Wiktionary (CC BY-SA 3.0).