MD

MD, Md, mD or md may stand for:

Science

Doctor of Medicine, from the Latin Medicinae Doctor (MD)
Mean difference, a measure of statistical dispersion
Md, the symbol for the chemical element Mendelevium
Mesoscale Discussion, a short-term technical meteorological forecast concerning convection (MCD) or precipitation (MPD)
Methyldichloroarsine, a blister agent used in chemical warfare
Millidarcy (mD), one thousandth of a darcy, a unit of fluid permeability
Molecular dynamics, a method of computer simulation of molecular interaction
Muscular dystrophy, a genetic and hereditary muscle disease
Medial dorsal nucleus, a large nucleus in the thalamus

MD, United States postal abbreviation for state of Maryland (also "Md.")
Moldova, a country that has the ISO country code and Internet top-level domain ".md"
Licence-plate prefix for Magdeburg, a city in Germany

Main droite/mano destra (abbreviated MD or m.d.), used in piano scores to mark sequences of notes that are to be played with the right hand
MiniDisc, an optical storage medium developed by Sony
Music director; the term "MD" is used particularly in musical theatre

Managing director, a term used for the chief executive of many companies
Prefix of names of some aircraft produced by McDonnell Douglas, a former aerospace manufacturer later merged with Boeing
IATA airline code for Air Madagascar

RAID drive linux kernel, also known as "md" for "multiple drive"
"md", alternative form of computer operating system command Mkdir, that creates a directory
Microdrive, a type of miniature hard drive
a filename extension for documentation in Markdown format
Message-digest algorithm, a cryptographic hashing function

Majority decision, a winning criterion in several full-contact combat sports
Man-day, amount of work performed by the average worker in one day
Materiali e discussioni per l'analisi dei testi classici, a classics journal
Mega Drive, a console produced by Sega
MDs (TV Series), a 2002 made-for-television medical drama
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
The name Muhammad or Mohammed, as is abbreviated by many people in Bangladesh, India, Pakistan and South East Asia
Major Douglas, a British Engineer and pioneer of the Social Credit economic reform movement
Marque Déposée, international trademarking symbol in countries where French is the dominant language