MBD or MBd may refer to:

Science and technology

Biology and medicine

• Marchiafava–Bignami disease, a neurological disease associated with alcoholism

• Metabolic bone disease, typically resulting from mineral deficiency

• Methyl-CpG-binding domain protein 2 a protein which bind the DNA on its methyl-CpG

• Minimal brain dysfunction or minimal brain damage, obsolete terms for attention deficit hyperactivity disorder, dyslexia and other learning disabilities

Computing

• Megabaud (MBd), equal to one million baud, symbol rate in telecommunications

• Model-based definition, a method of using 3D CAD information to provide product specifications

• Model-based design, a mathematical and visual method of addressing problems associated with designing complex control, signal processing and communication systems

• Motherboard, a computer component

Physics

• Maxwell–Boltzmann distribution, a probability distribution in physics and chemistry

• Multibody dynamics

Media

• Mordechai Ben David, a Jewish singer and recording artist

• Murder by Death (band), an indie rock band

• My Brightest Diamond, chamber rock band of Shara Worden

• Man bites dog (journalism), a shortened version of an aphorism in journalism

Other uses

• IATA code for Mahikeng or Mmabatho Airport in South Africa

• Member Board of Directors

• Microsoft Business Division, responsible for making Microsoft Office