Optical-disc definition

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.
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Any disk on which data, as computer text files, video images, or music, is recorded as microscopic pits to be read by a laser.
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A modern data storage medium consisting of a flat disc read mechanically by illumination with laser light. Various formats include the Laserdisc, compact disc, DVD, and Blu-ray.
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Other Word Forms

Noun

Singular:
optical-disc
Plural:
optical-discs