MD, Md, mD or md may refer to:
Medicine
- M.D. (from Latin Medicinae Doctor) or Doctor of Medicine, a medical degree
- MD (Ayurveda), a medical degree in India
- MD (Homeopathy), a medical degree in India
- Ménière's disease, a disorder of the inner ear
- Muscular dystrophy, a group of diseases involving breakdown of skeletal muscles
Places
- Moldova (ISO country code MD)
- Maryland (US postal abbreviation MD)
- Magdeburg (vehicle plate prefix MD), a city in Germany
- Mödling District (vehicle plate prefix MD), in Lower Austria, Austria
People
- Muhammad (name) or Mohammed (Md)
Arts, entertainment, and media
Music
- Main droite or mano destra (MD or m.d.; "right hand"), in piano scores
- Music director
- Mini Disc
Other arts, entertainment, and media
- MDs (TV series), 2002
- Materiali e discussioni per l'analisi dei testi classici, ("Materials and discussions for the analysis of classical texts"), an Italian journal
- Murder Drones, an Australian animated web series
Brands and enterprises
- Air Madagascar, IATA airline code
- McDonnell Douglas aircraft model prefix
- MD Helicopters
Science and technology
Computing
- .md, Internet top-level domain for Moldova
- Markdown (file extension .md), a format
- Microdrive, a type of miniature hard drive
- mkdir or
md
, "make directory" command - Multiple device, as in Linux mdadm device driver
- Sega Genesis or Mega Drive, a video game console
Other uses in science and technology
- Mean absolute difference
- Mendelevium, symbol Md, a chemical element
- Mesoscale discussion in Storm Prediction Centers and Weather Prediction Centers
- Methyldichloroarsine, a chemical warfare agent
- Millidarcy (mD), a unit of fluid permeability
- Molecular dynamics
- Membrane distillation
- Earthquake duration magnitude (Md )
Other uses
- MD, 1500 in Roman numerals
- Majority decision, in full-contact combat sports
- Managing director, of a company
- Marque déposée or trademark in Canada in Unicode subscripts and superscripts
- Match Director in International Practical Shooting Confederation match
- Military districts of Russia, sometimes abbreviated as MD
- Mandal, an administrative sub division (third-tier) in India
- MDMA, sometimes abbreviated as MD
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