optical disc(redirected from PD disc)
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optical discor optical disk
A plastic-coated disk on which data, such as text, music, or video, is digitally stored as microscopic regions of varying reflectivity and is read by scanning the surface with a laser. Also called laser disc.
(Computer Science) computing an inflexible disc on which information is stored in digital form by laser technology. Also called: video disc
1. Also called laser disc. a grooveless disk on which digital data, as text, music, or pictures, are stored as tiny pits in the surface and read or replayed by a laser beam scanning the surface.
2. videodisc.Compare compact disc.
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|Noun||1.||optical disc - a disk coated with plastic that can store digital data as tiny pits etched in the surface; is read with a laser that scans the surface|
compact disc, compact disk, CD - a digitally encoded recording on an optical disk that is smaller than a phonograph record; played back by a laser