Simple Definition of optical disk
: a computer disk on which information is recorded in a way that can be read by a laser
Full Definition of optical disk
: a disk with a plastic coating on which information (as music, visual images, or computer data) is recorded digitally (as in the form of tiny pits) and which is read by using a laser
First Known Use of optical disk
Seen and Heard
What made you want to look up optical disk? Please tell us where you read or heard it (including the quote, if possible).