noun, plural ter·a·to·mas, ter·a·to·ma·ta [ter-uh–toh-muh-tuh] /ˌtɛr əˈtoʊ mə tə/. Pathology.
- a tumor made up of different types of tissue.
noun plural -mata (-mətə) or -mas
- a tumour or group of tumours composed of tissue foreign to the site of growth
n. pl. ter•a•to•mas
- A tumor consisting of different types of tissue, as of skin, hair, and muscle, caused by the development of independent germ cells.teratoblastoma teratoid tumor