from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun Whitish nerve tissue, especially of the brain and spinal cord, consisting chiefly of myelinated nerve fibers.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun neuroanatomy A region of the
central nervous systemcontaining myelinated nerve fibresand no dendrites
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun whitish nervous tissue of the CNS consisting of neurons and their myelin sheaths
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