teratoma

ter·a·to·ma

noun \ˌter-ə-ˈtō-mə\

plural ter·a·to·mas also ter·a·to·ma·ta \-mət-ə\

Definition of TERATOMA

: a tumor derived from more than one embryonic layer and made up of a heterogeneous mixture of tissues (as epithelium, bone, cartilage, or muscle)

—ter·a·to·ma·tous \-mət-əs\ adjective