medulloblast

me·dul·lo·blast mə-'dəl-ə-.blast, 'mej-ə-lə- n a primitive undifferentiated nerve cell of the neural tube that is capable of developing into either a neuroblast or a spongioblast and that is found in medulloblastomas

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me·dul·lo·blast (mə-dulґo-blast) an undifferentiated cell of the embryonic neural tube that may develop into either a neuroblast or a spongioblast.