SYN: embryonal tumor.
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em·bry·o·ma .em-brē-'ō-mə n, pl -mas also -ma·ta -mət-ə a tumor derived from embryonic structures: TERATOMA
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em·bry·o·ma (em″bre-oґmə) any neoplasm thought to be derived from embryonic cells or tissues, such as a dermoid cyst, teratoma, primitive neuroectodermal tumor, embryonal carcinoma or sarcoma, nephroblastoma, or hepatoblastoma. Called also embryonal tumor.Medical dictionary. 2011.