panencephalitis

[ păn′ĕn-sĕf′ə-lītĭs ]

n.

Encephalitis that affects both the gray and white matter of the brain, resulting in progressive loss of mental and motor functions.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.