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compact disk

an optical disk approximately 4.75 inches (12 cm) in diameter, on which a program, data, music, etc., is digitally encoded for a laser beam to scan, decode, and transmit to a playback system, computer monitor, or television set.
Abbreviation: CD.
Compare optical disk (def 1). Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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compact disk in Science
compact disk or compact disc
A small optical disk on which data such as music, text, or graphic images is digitally encoded.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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