stereogram

from The Collaborative International Dictionary of English v.0.48
Stereogram \Ste"re*o*gram\, n. [Stereo- + -gram.]
   A diagram or picture which represents objects in such a way
   as to give the impression of relief or solidity; also, a
   stereograph.
   [1913 Webster]
    
from The Free On-line Dictionary of Computing (8 July 2008)
stereogram

   A two-dimensional image which, when viewed correctly appears
   three-dimensional.  E.g. {SIRDS} or {SIRTS}.

   (ftp://katz.anu.edu.au/pub/stereograms).

   (1994-11-03)
    

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