MU
- .mu
- 4chan
- Aries Mu
- Athing Mu
- Australia
- BlazBlue
- Bridging ligand
- Centimorgan
- Chemical potential
- China Eastern Airlines
- Coefficient of friction
- Complex cobordism
- Deformation (physics)
- Edolo
- Electron mobility
- Emperor Mu of Jin
- General recursive function
- Gray (unit)
- Groupe μ
- Isuzu MU Wizard
- Jah Wobble
- Jeff Cotton
- King Mu of Chu
- King Mu of Zhou
- Korean radish
- Linear density
- Love Live! School Idol Project
- M (disambiguation)
- M operator
- M.U. – The Best of Jethro Tull
- MU (musician)
- MU Press
- MU puzzle
- Macquarie University
- Madras University
- Magnetic dipole moment
- Mahidol University
- Manchester United F.C.
- Mandalay University
- Manipur University
- Marquette University
- Marquis Mu of Cai
- Marquis Mu of Jin
- Marshall University
- Marymount University
- Maryville University
- Masaryk University
- Mauritius
- Mega Man Star Force 2
- Meiho University
- Merrell Fankhauser
- Messiah University
- Metropolitan University (disambiguation)
- Micro-
- Micrometre
- Micron Technology
- Millersville University of Pennsylvania
- Misamis University
- Miss Universe
- Monash University
- Mondragon University
- Monitor unit
- Monsters University
- Moo (disambiguation)
- Mothers' Union
- Mouse unit
- Mu (album)
- Mu (cuneiform)
- Mu (kana)
- Mu (land)
- Mu (letter)
- Mu (mythical lost continent)
- Mu (negative)
- Mu (rocket family)
- Mu (shaman)
- Mu (surname)
- Mu Dan
- Mu Dynamics
- Mu La Flaga
- Mu Online
- Mu Performing Arts
- Mu River (Hokkaidō)
- Mu River (Irrawaddy)
- Mu family
- Mu of Baekje
- Mu of Balhae
- Mu phage
- Mu-metal
- Muism
- Multiple unit
- Mumbai University
- Muon
- Muonium
- Murdoch University
- MuseScore
- Musician (United States Navy)
- Musicians' Union (UK)
- Mzumbe University
- Möbius function
- New South Wales
- Olympus mju
- Permeability (electromagnetism)
- Planet Mu
- Proton-to-electron mass ratio
- Reduced mass
- Richard Henshall
- Rings of Uranus
- SARS-CoV-2 Mu variant
- Standard gravitational parameter
- Ukrainian language
- University of Missouri
- Viscosity
- Xenoblade Chronicles 3