CD

n. (Chemistry) bluish-white metal which resembles tin (found in zinc ores)

n. 4.75 inch plastic disc containing digital data; optical disc which is read by a laser (Computers)

.cd is the Internet country code top-level domain (ccTLD) for the Democratic Republic of the Congo. It was created in 1997 as a replacement for the .zr (Zaire) ccTLD, which was phased out and eventually deleted in 2001.Except for reserved names like .com.cd, .net.cd, .org.cd and others, any person in the world can register a .cd domain for a fee, much of the income from which goes to the government and people of the country. The ccTLD is popular (and thus economically valuable) due to it being an abbreviation for compact disc (other similar ccTLDs are .fm, .am, .tv, .ws and .dj).
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CD or C/D or Cd or cd may stand for:Compact DiscCD-ROMCertificate of deposit (time deposit)CD represents 400 in Roman numerals — meaning 100 (C) less than 500 (D).In science and computers:.cd, the Internet domain of the Democratic Republic of the CongoChalmers Computer Society, CD (from Swedish Chalmers Datorförening))chdir, a DOS/Unix commandCadmium (chemical element Cd)Candela (cd, a unit of light intensity)Circular dichroismDrag coefficient (Cd)Cluster of differentiation in cell surface markersGiant diffuse galaxy, also known as a cD galaxyIn psychiatry, chemical dependency
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A Compact Disc or CD is an optical disc used to store digital data, originally developed for storing digital audio. The CD, available on the market since late 1982, remains the standard playback medium for commercial audio recordings to the present day, although it has lost ground in recent years to MP3 players, which have greater storage capability, albeit with noticeably lower sound quality in most cases.
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České dráhy or Czech Railways (ČD or CD) is the main railway operator of the Czech Republic and provides passenger and freight service via state owned rail tracks. It is a significant company in an international railway transport and a member of important European and world institutions, e.g. the International Railway Union, Community of European Railways and the Organization for Railways Cooperation (Asia and Europe).
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CD, compact disc, 4.75 inch plastic disc containing digital data, small disk used for storing computerized information, optical disc which is read by a laser

compact disc, small disk used for storing computerized information (i.e. computer programs, music, etc.)

diplomatic corps, entire staff of diplomats resident at a capital, diplomatic body

n. compact disc

CD, compact disc, 4.75 inch plastic disc containing digital data; optical disc which is read by a laser (Computers)