Definition of hologram
: a three-dimensional image reproduced from a pattern of interference produced by a split coherent beam of radiation (as a laser); also : the pattern of interference itself
Did You Know?
A hologram is a picture of a "whole" object, showing it in three dimensions. We've all seen cheap holographic images on credit cards and ID cards (where they help prevent copying). Far more impressive are large holograms that take the form of a ghostly 3-D moving figure that you can walk around to see from all angles. Holograms were invented in 1947 but only perfected after the invention of the laser in 1960. Today they're used in such technologies as compact-disc players and checkout scanners, and holograms can be created of the inside of live internal organs to permit doctors to examine the organs in great detail. And soon televisions with hologram technology may enable us to watch in "3-D".
First Known Use of hologram
HOLOGRAM Defined for English Language Learners
Definition of hologram for English Language Learners
: a special kind of picture that is produced by a laser and that looks three-dimensional
HOLOGRAM Defined for Kids
Definition of hologram for Students
: a three-dimensional picture made by laser light reflected onto a photographic substance without the use of a camera
Seen and Heard
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