white matter
n. The off-white tissue of the brain and spinal cord which is given its hue by the myelin sheaths that insulate nerve fibers, as opposed to the gray appearance of nerve cell bodies and unmyelinated nerve fibers.
n. The off-white tissue of the brain and spinal cord which is given its hue by the myelin sheaths that insulate nerve fibers, as opposed to the gray appearance of nerve cell bodies and unmyelinated nerve fibers.
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