systematized delusion

[ sĭstə-mə-tīzd′ ]

n.

Any of various delusions that are logically founded upon false premises and form part of an organized group of related delusions.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.