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gray column in Medicine

gray column

n.
  1. Any of the three masses of gray matter that extend longitudinally through the center of each lateral half of the spinal cord and appear as gray horns in transverse sections.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.