Meaning of optical disk

op'tical disk'

Pronunciation: [key]
— Computers, Television. Computers,Television.
  1. Also calleda 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.
  2. videodisk. Cf.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.