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hologram

[hol-uh-gram, hoh-luh-] /ˈhɒl əˌgræm, ˈhoʊ lə-/
noun, Optics.
1.
a negative produced by exposing a high-resolution photographic plate, without camera or lens, near a subject illuminated by monochromatic, coherent radiation, as from a laser: when it is placed in a beam of coherent light a true three-dimensional image of the subject is formed.
Also called holograph.
Origin
1945-1950
1945-50; holo- + -gram1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for hologram
  • As hologram and data-transmission technologies improve over the next decade, the rooms will increasingly meld together, he says.
  • In the final chapter of your book, you suggest that the world may be a hologram.
  • Light waves from the two beams interfere with each other, imprinting into the plastic a hologram-a three-dimensional pattern.
  • You'll be able to have dinner at home tonight because you could come here as a hologram.
  • Every signature has been witnessed by a company representative and is marked with their unique hologram.
  • Banknotes also incorporate security elements, including a watermark and hologram.
  • They come in what appears to be authentic packaging complete with a phony hologram.
  • There used to be an arcade game that utilized a literal hologram.
  • The hologram was made with the direct to digital holography system described and pictured above.
  • The digital license provides for a number of security features including a small ghost photo image and an embedded hologram.
British Dictionary definitions for hologram

hologram

/ˈhɒləˌɡræm/
noun
1.
a photographic record produced by illuminating the object with coherent light (as from a laser) and, without using lenses, exposing a film to light reflected from this object and to a direct beam of coherent light. When interference patterns on the film are illuminated by the coherent light a three-dimensional image is produced
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for hologram
n.

1949, coined by Hungarian-born British scientist Dennis Gabor (Gábor Dénes), 1971 Nobel prize winner in physics for his work in holography; from Greek holos "whole" (in sense of three-dimensional; see safe (adj.)) + -gram.

Online Etymology Dictionary, © 2010 Douglas Harper
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hologram in Medicine

hologram hol·o·gram (hŏl'ə-grām', hō'lə-)
n.
A three-dimensional diffraction pattern of the image of an object made using holography.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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hologram in Science
hologram
  (hŏl'ə-grām', hō'lə-)   
A three-dimensional image of an object made by holography.

Our Living Language  : To produce a simple hologram, a beam of coherent, monochromatic light, such as that produced by a laser, is split into two beams. One part, the object or illumination beam, is directed onto the object and reflected onto a high-resolution photographic plate. The other part, the reference beam, is beamed directly onto the photographic plate. The interference pattern of the two light beams is recorded on the plate. When the developed hologram is illuminated from behind (in the same direction as the original reference beam) by a beam of coherent light, it projects a three-dimensional image of the original object in space, shifting in perspective when viewed from different angles. Appropriately enough, the word hologram comes from the Greek words holos, "whole," and gramma, "message." If a hologram is cut into pieces, each piece projects the entire image, but as if viewed from a smaller subset of angles. The large amount of information contained in holograms makes them harder to forge than two-dimensional images. Many credit cards, CDs, sports memorabilia, and other items include holographic stickers as indicators of authenticity. Holography is used in many fields, including medicine, data storage, architecture, engineering, and the arts.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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