gray matter
n. The parts of the brain and spinal cord in which cell bodies and unmyelinated nerve fibers, which are gray in color and contrast with the shiny yellow-white myelin sheaths of neuronal fibers, predominate.
n. The parts of the brain and spinal cord in which cell bodies and unmyelinated nerve fibers, which are gray in color and contrast with the shiny yellow-white myelin sheaths of neuronal fibers, predominate.
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