a method of making three-dimensional photographs without a camera, by splitting a laser beam into two beams and recording on a photographic plate the minute interference patterns made by one beam going from the laser to the plate and the other beam going from the laser to the object to the plate: the virtual image can be reconstructed by shining laser light, white light, etc. through the developed film
Origin of holographyholo- + -graphy
A method of producing a three-dimensional image of an object by recording on a photographic plate or film the pattern of interference formed by a split laser beam and then illuminating the pattern either with a laser or with ordinary light.
holo- (“whole”) + -graphy