MMD may refer to:
Science and technology Molar mass distribution, in a polymer MultiMarkdown, a markup language Multiple dispatch, a feature of some programming languages MMD, a loudspeaker parameter of the Thiele/Small model equivalent MDIO Manageable Devices, target devices that are being managed by the Management Data Clock in Management Data Input/Output (MDIO) Mass median diameter, in particle-size distribution
Organisations Mercury Musical Developments, an arts organisation in the United Kingdom Movement for Multi-Party Democracy, a Zambian political party Microwave Measurements Division, of Anritsu corporation Multimedia Displays, a company of TPV Technology Other uses 2500 in Roman numerals Merchant Mariner's Document Mid Manair Dam, a dam located in Telangana, India MikuMikuDance, a free 3D dance animation program Minami-Daito Airport (IATA code) Municipal Market Data, a yield curve of AAA-rated bonds issued by U.S. states Murder mystery dinner Michelle Marquez Dee (born 1995), Filipino actress, beauty pageant titleholder and the daughter of Miss International 1979, Melanie Marquez A US Navy hull classification symbol: Fast minelayer (MMD)
See also Mini-Micro Designer 1 (MMD-1), a type of single-board computer