From The Collaborative International Dictionary of English v.0.44 [gcide]:
hologram \hol"o*gram\, noun A photographic image giving the observer a seemingly three-dimensional view of the represented object. The three-dimensional effect is produced by exposing a photographic recording medium to an interference pattern generated by a coherent beam of light (as from a laser) reflected from the subject, interacting with a beam directly from the source. The full three-dimensional effect requires illumination of the image with coherent light, but less perfect three-dimensional visual effects may also be observed when the hologram is illuminated with white light. [PJC]
From WordNet (r) 2.0 [wn]:
From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]:
22 Moby Thesaurus words for "hologram": Photostat, Xerox, Xerox copy, blowup, blueprint, contact printing, cyanotype, enlargement, glossy, lantern slide, matte, microcopy, microprint, photocopy, photogravure, photostatic copy, positive, print, projection printing, semi-matte, slide, transparency
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