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WordReference Random House Learner's Dictionary of American English © 2024hol•o•gram /ˈhɑləˌgræm, ˈhoʊlə-/USA pronunciation n. [countable]- Opticsa three-dimensional image of an object, produced by the patterns formed by a laser beam. Also called holograph.
WordReference Random House Unabridged Dictionary of American English © 2024hol•o•gram (hol′ə gram′, hō′lə-),USA pronunciation n. [Optics.]- Opticsa 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.
Collins Concise English Dictionary © HarperCollins Publishers:: hologram /ˈhɒləˌɡræm/ n - 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
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