Definition of compact disc Compact disc
We found 3 definitions of compact disc from 3 different sources.
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What does compact disc mean?
WordNet
Noun |
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| compact disc - a digitally encoded recording on an optical disk that is smaller than a phonograph record; played back by a laser | ||
| compact disk, CD | ||
| optical disc, optical disk a disk coated with plastic that can store digital data as tiny pits etched in the surface; is read with a laser that scans the surface | ||
| recording the act of making a record (especially an audio record); "she watched the recording from a sound-proof booth" | ||
| audio cd, audio compact disc compact discs used to reproduce sound (voice and music) | ||
| cd-r, cd-wo, compact disc recordable, compact disc write-once a compact disc on which you can write only once and thereafter is read-only memory | ||
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Wikipedia 
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A Compact Disc or "CD" is a flat round disc used to store digital data. It is used to store music and other sounds (and sometimes called an "audio CD"). The sounds on the CD are played using a compact disc player.
Later, Compact Discs were made that could be used to put computer files on in the same way as audio compact discs. These are called CD-ROMs (Compact Disc Read Only Memory). The computer 'reads' the disc using a CD-ROM drive. Another use is to store MPEG video's cheaply, these CDs are called VCDs (Video CDs) and are especially popular in Asia. For example, in Indonesia they are used instead of the more expensive DVD.
The diameter of a normal CD is 120 mm. The middle hole in a CD is about the size of a five cent coin (About 1.5 cm). The person who decided the size was Dutch and used the size of an old Dutch coin (old because the Dutch now have switched to the Euro), called a "dubbeltje", or dime.
Some CDs are smaller; they are 80mm in diameter. They can hold about 30% of the capacity of a normal disc.
