teratoid /ˈtɛɹ.ə.tɔɪd/noun 2adjective 1forms 3 noun2 •An abnormal tumor similar to a teratoma.In each of these divisions there are subdivisions, according as the parasite consists of a more or less recognisable foetus, or only of a mass of foetal tissue (teratomata, teratoids, dermoids). — 1903 •A mutant.I wanted to explore how at the launch of a new millennium many people were beginning to feel like teratoids in the global commodity exchange. — 2002 adjective1 •Monster-like, exhibiting abnormal development.Lucien, staring goggle-eyed at the only brother he’s ever had, is standing very still, face still unwittingly teratoid, the broom at an angle in his hand, the Colt dangling at his side, […] — 1996 formsteratoids · more teratoid · most teratoid