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delusion of grandeur in Medicine

delusion of grandeur

(grănjər, -jur′)
n.
  1. A delusion in which one believes oneself possessed of great importance, power, wealth, intellect, or ability.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.