MD

MD, Md, mD or md may stand for:

Science

• Doctor of Medicine, from the Latin Medicinæ Doctor (MD)
• Macular degeneration, a condition characterized by progressive thinning and atrophy of the macula area of the retina
• Mahalanobis distance, a distance measure introduced by P. C. Mahalanobis in 1936
• Mean difference, a measure of statistical dispersion
• Mendelevium (Md), a symbol for a synthetic chemical element
• Methyldichloroarsine, a blister agent
• Millidarcy (mD), one thousandth of a darcy, a unit of fluid permeability that is sometimes more convenient than the darcy
• Missing data, in statistics, a situation where no data value is stored for the variable in the current observation
• Molecular dynamics, a form of computer simulation where atoms and molecules are allowed to interact for a period of time under known laws of physics
• Muscular dystrophy, a genetic and hereditary muscle disease
• Myotonic dystrophy, a type of muscular dystrophy
• Medial dorsal nucleus, a large nucleus in the thalamus
• Mesoscale discussion, a statement produced by the United States Storm Prediction Center when conditions appear favorable for development of severe storms

Geography

• Maryland, United States postal abbreviations for American state
  • Md., an older abbreviation for Maryland
• Moldova, a country that has the ISO country code and Internet top-level domain ".md"
• Magdeburg, a city in Germany
• Miami-Dade County, Florida, a county in the United States

Music

• Miles Davis, a jazz trumpeter, bandleader, and composer
• MiniDisc, an optical storage medium developed by Sony
• Music director, also called a musical director, a profession in various fields of entertainment
• My December, a studio album by Kelly Clarkson

Companies

• Managing director, a term used for the chief executive of many companies
• McDonnell Douglas, a former major American aerospace manufacturer, now merged with Boeing
• MediaDefender, a company that tries to thwart P2P file sharing
• Mountain Dew, a company that produces limeade soda
• Air Madagascar, which has the IATA airline code "MD"

Computing

• RAID drive linux kernel, also known as "md" for "multiple drive"
• Mkdir, also known as "md", a command in Unix, DOS, OS/2, and Windows, that creates a directory
• Microdrive, a type of miniature hard drive
• a filename extension for documentation in Markdown format

Miscellaneous

• Majority decision, a winning criterion in several full-contact combat sports
• Man-day, a unit of estimated work based on man-hours
• Materiali e discussioni per l'analisi dei testi classici, a classics journal
• Matthew Dent (designer), designer of the redesigned 2008 British coinage, whose initials can be seen embedded in most of the coins
• "Md.", a shortened version of the name Muhammad
• MD 20/20, a brand of fortified wine
• MDs (TV Series), a 2002 made-for-television medical drama
• Mega Drive, a console produced by Sega
• Metropolitan Division, a territory unit defined by the US Office of Management and Budget as a county or group of counties within a Metropolitan Statistical Area
• Missile Defense, a defensive weapon system intended to intercept incoming missiles
• Muscular Development, a bodybuilding magazine
• Infinite Challenge, also known as Muhan Dojeon, a South Korean comic-variety TV programme