from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun Any of the embryonic epithelial cells that give rise to the neuroglia.
from The Century Dictionary.
- noun In histology, one of the branching ectodermic cells situated in the embryonic brain and spinal cord and giving rise to the neuroglia: distinguished from
- noun One of the granules in the reticular layer of the retina which send prolongations into the layer of rods and cones.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun any of various columnar epithelial cells in the central nervous system that develop into neuroglia
from The American Heritage® Dictionary of the English Language, 4th Edition
[Latin spongia, sponge; see sponge + –blast.]
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