Also found in: Thesaurus, Medical, Acronyms, Encyclopedia, Wikipedia.
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.
optical diskor optical disc
A plastic-coated disk that stores digital data, such as music or text, as tiny pits etched into its surface. Optical disks are read with a laser scanning the surface.
Switch to new thesaurus
|Noun||1.||optical disk - 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