compact disc

Collins
World English Dictionary
compact disc (ˈkɒmpækt)
 
n
Also called: compact audio disc, CD, Abbreviation: CAD a small digital audio disc on which sound is recorded as a series of metallic pits enclosed in PVC; the disc is spun by the compact disc player and read by an optical laser system

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
compact disk or compact disc   (kŏm'pākt')  Pronunciation Key 
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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FOLDOC
Computing Dictionary

Compact Disc definition

storage
(CD) (Not "disk", this spelling is part of the standard).
A 4.72 inch disc developed by Sony and Philips that can store, on the same disc, still and/or moving images in monochrome and/or color; stereo or two separate sound tracks integrated with and/or separate from the images; and digital program and information files.
The same fabrication process is used to make both audio CDs and CD-ROMs for storing computer data, the only difference is in the device used to read the CD (the player or drive).
CD Information Center (http://cd-info.com/cd-info/CDInfoCenter.html).
(1999-06-23)
The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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