optical disc

optical disk or optical disc

n.

A plastic-coated disk that stores digital data, such as music or text, as tiny pits etched into the surface and is read with a laser scanning the surface. Also called laser disk. See Usage Note at compact disk.

Thesaurus

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 optical disk 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 memory device, storage device - a device that preserves information for retrieval DVD, videodisc, videodisk - a digital recording (as of a movie) on an optical disk that can be played on a computer or a television set