ter·a·to·ma 
(tĕr′ə-tōmə)
(tĕr′ə-tōmə)n. pl. ter·a·to·mas or ter·a·to·ma·ta (-mə-tə)
A tumor consisting of different types of tissue, as of skin, hair, and muscle, caused by the development of independent germ cells.
ter′a·toma·tous (-tōmə-təs) adj.