blastoma

noun, plural blas·to·mas, blas·to·ma·ta [bla-stoh-muh-tuh] /blæˈstoʊ mə tə/. Pathology.

1. a tumor originating from undifferentiated embryonic cells and having little or no connective tissue.

noun plural -mata or -mas

1. pathol
   1. a tumour composed of embryonic tissue that has not yet developed a specialized function
   2. (in combination)neuroblastoma

n. pl. blas•to•mas

1. A neoplasm composed of immature, undifferentiated cells.blastocytoma embryonal carcinosarcoma