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
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