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]
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)