white matter

white matter   n.  Whitish nerve tissue, especially of the brain and spinal cord, consisting chiefly of myelinated nerve fibers.

Main Entry: white matter
Function: noun
: neural tissue that consists largely of myelinated nerve fibers, has a whitish color, and underlies the gray matter of the brainand spinal cord or is gathered into nerves

white matter n.
Whitish nerve tissue, especially of the brain and spinal cord, chiefly composed of myelinated nerve fibers and containing few or no neuronal cell bodies or dendrites. Also called alba, substantia alba, white substance.

white matter   The whitish tissue of the vertebrate brain and spinal cord, made up chiefly of nerve fibers (axons) covered in myelin sheaths. Compare gray matter.