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WordReference Random House Unabridged Dictionary of American English © 2024op′tical disk′, [Computers, Television.]- Computing, Radio and TelevisionAlso, op′tical disc′. Also called laser disk. a grooveless disk on which digital data, as text, music, or pictures, is stored as tiny pits in the surface and is read or replayed by a laser beam scanning the surface.
- Radio and Televisionvideodisk. Cf. compact disk.
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