from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An often fatal degenerative disease of the central nervous system occurring chiefly in young people, caused by slow infection with a measles virus and characterized by progressive loss of mental and motor functions ending in dementia and paralysis.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a rare chronic progressive encephalitis caused by the measles virus and occurring primarily in children and young adults; death usually occurs within three years; characterized by primary measles infection before the age of two years
sclerosing, from sclerose, to harden, back-formation from sclerosed.(American Heritage® Dictionary of the English Language, Fourth Edition)