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degeneration of the white substance of the spinal cord, the fibers of which lose their myelin sheaths and darken.
Farlex Partner Medical Dictionary © Farlex 2012
gray de·gen·er·a·tion(grā dĕ-jen'ĕr-ā'shŭn)
Degeneration of the white substance of the spinal cord, the fibers of which lose their myelin sheaths and become darker in color.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
Degeneration in myelinated nerve tissue due to chronic inflammation, causing the nerve tissue to turn gray.
See also: degeneration
Medical Dictionary, © 2009 Farlex and Partners