1) Columnar cell 2) Columnar epithelial cell 
Cell found in developing nervous system: gives rise to astrocytes and oligodendrocytes. ... (18 Nov 1997) ... 
(spun´je-o-blast) any of the embryonic epithelial cells developed about the neural tube; they later become transformed, some into neuroglial and some into ependymal cells. amacrine (def. 2).
Cell found in developing nervous system: gives rise to astrocytes and oligodendrocytes.
Type: Term Pronunciation: spŭn′jē-ō-blast′ Definitions: 1. A neuroepithelial, filiform ependymal cell extending across the entire thickness of the wall of the brain or spinal cord, from the internal to the external limiting membrane; spongioblasts become neuroglial and ependymal cells.
[n] - any of various columnar epithelial cells in the central nervous system that develop into neuroglia
noun any of various columnar epithelial cells in the central nervous system that develop into neuroglia