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gray degeneration

gray degeneration in Medicine

gray degeneration n.
The degeneration of the white substance of the spinal cord, the fibers of which lose their myelin sheaths and become darker in color.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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