CD (disambiguation)

CD, or compact disc, is a thin plastic silvery disc for audio recordings.

CD or cd may also refer to:

Science and technology

Astronomy and cosmology

• Cordoba Durchmusterung, a star catalog of the southern sky
• Cosmological decade or CÐ, a unit of time
• Type-cD galaxy, a galaxy morphology classification

Biology, ecology, and medicine

• Coeliac disease, long term autoimmune disorder causing intolerance to gluten
• Conduct disorder, a psychological disorder
• Conservation Dependent or LR/cd, an IUCN category
• Cluster of differentiation, a protocol used for the identification of cell surface molecules on white blood cells
• Crohn's disease
• Chlordane
• Communicable disease

Computing

• CD-ROM, compact disc technology applied for use in computer data
• cd (command), a shell command to change the current working directory
• continuous delivery, a software development design practice
• continuous deployment, a software development design practice
• collision detection, CSMA/CD

Mathematics

• cd (elliptic function), one of Jacobi's elliptic functions

Other uses in science and technology

• Cadmium, symbol Cd, a chemical element
• Candela or cd, a unit of light intensity
• -CD, the North American call sign suffix for Class A low-power television stations operating with digital signals
• Circular dichroism, a form of spectroscopy
• Critical Dimension, the minimum feature size that a projection system can print in photolithography
• Drag coefficient or c_d, a dimensionless quantity used to quantify the drag of an object in a fluid
• Cluster decay, a rare mode of nuclear decay

Businesses and organizations

Government, military, and political

• Canadian Forces' Decoration, by post-nominal letters
• Centre Democrats (Denmark), a Danish former political party
• Centre Democrats (Netherlands), a former political party of the Netherlands
• Centro Democratico, a political party in Italy
• Christian democracy, a political ideology
• Citizen's dividend, proposed policy based upon the Georgist principle that the natural world is the common property of all people
• Civil defense, an effort to protect the citizens of a state from military attack and natural disasters
• Community of Democracies, an intergovernmental organization of democracies and democratizing countries
• Conference on Disarmament, an international forum that negotiates multilateral arms control and disarmament agreements
• Corps Diplomatique, the collective body of foreign diplomats accredited to a particular country or body
• FBI Counterintelligence Division, the United States Federal Bureau of Investigation's division responsible for investigating espionage

Other business and organizations

• Certificate of deposit, a bank account in the United States with a fixed maturity date
• České dráhy or ČD, a railway operator of the Czech Republic
• Commander of the Order of Distinction, a rank in the Jamaican Orders of Societies of Honour

Places

• Central District, Seattle, a district in Seattle
• Democratic Republic of the Congo, by ISO 3166-1 alpha-2 country code
  • .cd, the Internet domain of the Democratic Republic of the Congo
• cd., abbreviation for caddesi, street, in Turkish

Transport

• Chandrapur railway station (Station code: CD), Maharashtra, India
• Corendon Dutch Airlines (IATA code)

Other uses

• 400 (number), written CD in Roman numerals
• 205 (number), written CD in hexadecimal
• AD 400 (CD), a year of the Common Era
• C.D (Criminal or Devil), a 2024 Indian psychological thriller film
• "CD", a song by T2 (band)
• cd, for cord (unit) of volume of wood
• Geely CD, a coupe automobile made by Geely Automobile
• Cairo Damascus or Damascus Document, a text found among the Dead Sea Scrolls
• Committee Draft, a status in the International Organization for Standardization
• Companion dog (title), a title offered to dogs by the American Kennel Club for dog obedience
• Cross-dressing, the act of wearing clothing associated with the opposite sex
• Sega CD, also known as the Sega Mega-CD, a CD-ROM accessory and format for the Sega Genesis produced by Sega as part of the fourth generation of video game consoles
  • Sonic CD, a 1993 platform game developed and published by Sega for the Sega CD
• Bitter CD, a luxury hatchback coupé
• Cúcuta Deportivo, a Colombian football club

See also

• All pages with titles beginning with CD
• All pages with titles containing CD
• CDS (disambiguation)
• CeeDee (disambiguation)
• C&D (disambiguation)