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polioencephalomeningomyelitis

(pō′lē-ō-ĕn-sĕf′ə-lō-mə-nĭng′gō-mī′ə-lītĭs)
n.
  1. Inflammation of the gray matter of the brain and spinal cord and of their meningeal covering.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.