MU

Film and television

• Aries Mu, a character from the anime Saint Seiya
• Mu La Flaga, a character from the anime Mobile Suit Gundam SEED
• Monsters University, a 2013 animated film by Disney and Pixar
• "μ's" (pronounced "Muse") is the name of the protagonist school idol group in the anime series Love Live!
• Miss Universe, one of the Big Four international women's beauty pageants, founded in 1952

Literature

• MU Press (short for "Miscellanea Unlimited Press"; c. 1990–2006), a Seattle-based publisher of primarily "furry" comic books
• Mu Dan (1918–1977), Chinese poet and translator

Music

Gaming

• Mu Online, a 2003 online role-playing game
• Mu, an ancient civilization from Mega Man Star Force 2
• Mu-12, a character from the BlazBlue series
• Colony Mu, a location from Xenoblade Chronicles 3

Computing and electronics

• μ, in evolutionary algorithms, the population size from which in each generation λ offspring will generate
• .mu, the ccTLD of Mauritius
• Mu Dynamics, a Sunnyvale-based company that makes software and hardware for testing network services, owned by Spirent Communications plc
• Micron Technology (NASDAQ symbol MU), a Boise-based semiconductor company that manufactures computer memory and data storage products
• Olympus mju (stylised as μ[mju:]), series of a compact cameras

Physics

• Coefficient of friction, used to approximate the force of friction
• Deformation (physics), as the "unit" of strain
• Electron mobility, relating the drift of electrons to the applied electric field across a material
• Linear density, a measure of mass per unit of length
• Magnetic dipole moment, a measure of the strength of a system's net magnetic source
• Mu-metal, a nickel-iron alloy with high magnetic permeability
• Muon, an elementary particle
• Muonium, exotic atoms made up of an antimuon and an electron
• Permeability (electromagnetism) coefficient, degree of magnetization of a material
• Proton-to-electron mass ratio, a dimensionless physical constant
• Reduced mass, the "effective" inertial mass appearing in the two-body problem
• Standard gravitational parameter of a celestial body
• Viscosity, the resistance of a fluid being deformed by stress

Chemistry

• Chemical potential, a form of potential energy that can be absorbed or released during a chemical reaction
• Bridging ligand, an atom that connects two or more metal centers in a complex (molecule)

Biology and medicine

• Bacteriophage Mu, a muvirus of the family Myoviridae of double-stranded DNA non-enveloped contractile tail bacterial viruses
• Map unit (m.u.) or centimorgan, a unit of recombinant frequency in genetics
• Monitor unit (MU), a measure of absorbed dose from a linear accelerator in radiation therapy = 0.001 Gray
• SARS-CoV-2 Mu variant, one of the variants of SARS-CoV-2, the virus that causes COVID-19
• Mouse unit (MU), the amount of toxin required to kill a 20g mouse in 15 minutes via intraperitoneal injection

Measurement

• μ-/micro-, metric prefix denoting a factor of 10⁻⁶ (one millionth)
• Micrometre (deprecated as a single-character symbol "μ" for micron)
• Million units of energy, a term used in India for a gigawatt-hour; see Kilowatt-hour § Other related energy units
• Mu (land), a Chinese unit of area also spelled "mou", equivalent to about 0.066 hectares

Mathematics

• MU puzzle, from the Douglas Hofstadter book Gödel, Escher, Bach
• mu operator, a prefix operator μ that finds the minimum natural number that satisfies some predicate
• Möbius function μ(n), a multiplicative function in number theory and combinatorics
• Membership function (mathematics), μ_A, the m of a fuzzy set (U, m)
• Set function μ, in measure theory
• MU and μ, symbols relating to complex cobordism, an extraordinary cohomology theory
• Population mean (symbol μ)

Other uses in science and technology

• The mu (μ) ring of Uranus

Mythical places

• Mu (mythical lost continent), a mythical continent in the Pacific Ocean

Other places

• Mu River (Irrawaddy), a river in Burma (Myanmar)
• Mu River (Hokkaidō), a river in Japan
• Mù, a village in the Edolo municipality of Italy
• Mauritius (ISO 3166-1 alpha-2 country code MU)

Surname

• Mu (surname), a romanization of a Chinese family name: most commonly 穆, 牧, or 慕, but other possibilities include 木, 母 [Mǔ], 目, 沐, 睦 and 暮

Nobles and royals

• Mu family, a powerful Chinese family from the 14th to the 18th century
• Mu of Baekje (580–641), king of Baekje
• Mu of Balhae (died 737), king of Balhae from 718 to 737
• Marquis Mu of Cai, ruler of the state of Cai from 675 to 646 BC
• King Mu of Chu (died 614 BC), king of the state of Chu from 625 to 614 BC
• Emperor Mu of Jin (343–361), emperor of the Eastern Jin Dynasty
• Marquis Mu of Jin (died 812 BC), ruler of the state of Jin from c. 798 to 776 BC
• King Mu of Zhou (died 922 BC), king of the state of Zhou from c. 976 to 922 BC

Other people

• Athing Mu-Nikolayev (born 2002 as Mu), American middle-distance runner
• Mu Dan (1918–1977), Chinese poet and translator

Australia

• Macquarie University, Sydney, New South Wales
• Monash University, Melbourne, Victoria
• Murdoch University, Perth, Western Australia

India

• Madras University, Chennai
• Mumbai University
• Manipur University, Imphal

United States

Asia and Oceania

• Mahidol University, Salaya, Thailand
• Mandalay University, Mandalay, Myanmar
• Meiho University, Pingtung, Taiwan
• Misamis University, Ozamiz City, Misamis Occidental, Philippines

Europe

• Masaryk University, Brno, Czech Republic
• Mondragon University, Mondragon, Spain

Africa

• Mzumbe University, Mzumbe, Tanzania

Elsewhere

• Metropolitan University (disambiguation)