Reference > American Heritage® > Dictionary > Illustrations > illusion
  idle wheel incandescent lamp  
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The American Heritage® Dictionary of the English Language: Fourth Edition.   2000.
 
illusion.
 
 
top: In a Hering figure, straight horizontal rules appear curved.
bottom: In Gestalt theory boxes, a gray box against a black background appears lighter than the same gray box against a white background.
(Source: Academy Artworks)
 
The American Heritage® Dictionary of the English Language, Fourth Edition. Copyright © 2000 by Houghton Mifflin Company. Published by the Houghton Mifflin Company. All rights reserved.
 
CONTENTS · INDEX · ILLUSTRATIONS · BIBLIOGRAPHIC RECORD
  idle wheel incandescent lamp  
 
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