# Index of physics articles (M)

The index of physics articles is split into multiple pages due to its size.
To navigate by individual letter use the table of contents below.

## Index of physics articles

* 0–9
* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z

## M

* M-theory
* M-theory simplified
* M. J. Whelan
* M. C. Joshi
* M. G. K. Menon
* M. J. Seaton
* M. Jamal Deen
* M. King Hubbert
* M. P. Parameswaran
* M. Shamsher Ali
* M. Vijayan
* M. Yousuff Hussaini
* M82 X-1
* MAJORANA
* MARIACHI
* MAUD Committee
* MAX-lab
* MAX IV
* MCP-RHEED
* MELCOR
* MEMO Model
* MERLIN
* MERLIN reactor
* MHD generator
* MINDO
* MINERνA
* MINOS
* MIRACL
* MIT Center for Theoretical Physics
* MIT Plasma Science and Fusion Center
* ML-1
* MNDO
* MNS matrix
* MOATA
* MOCADI
* MODTRAN
* MOPAC
* MOX fuel
* MPC&A
* MPRG Erlangen Division 3
* MSSM Higgs mass
* MSU Faculty of Physics
* MUSCL scheme
* MacCormack method
* MacDowell–Mansouri action
* Macedonio Melloni
* Mach's principle
* Mach bands
* Mach number
* Mach principle
* Mach reflection
* Mach tuck
* Mach wave
* Mache (unit)
* Macromolecular Chemistry and Physics
* Macromolecular Rapid Communications
* Macropore
* Macroscopic quantum self-trapping
* Macroscopic quantum phenomena
* Macroscopic quantum self-trapping
* Macroscopic quantum state
* Macroscopic scale
* Macrosonics
* Madelung constant
* Madelung equations
* Madison Symmetric Torus
* Magdeburg hemispheres
* Maggie Aderin-Pocock
* Magic angle
* Magic angle spinning
* Magic number (physics)
* Maglev wind turbine
* Magnecule
* Magnesium diboride
* Magnet
* Magnet wire
* Magnetar
* Magnetic Prandtl number
* Magnetic Resonance in Medicine
* Magnetic Reynolds number
* Magnetic anisotropy
* Magnetic anomaly detector
* Magnetic braking
* Magnetic capacitance
* Magnetic capacitivity
* Magnetic circuit
* Magnetic circular dichroism
* Magnetic complex impedance
* Magnetic confinement fusion
* Magnetic damping
* Magnetic deviation
* Magnetic diffusivity
* Magnetic dip
* Magnetic dipole
* Magnetic dipole–dipole interaction
* Magnetic domain
* Magnetic effective resistance
* Magnetic energy
* Magnetic evaporative cooling
* Magnetic field
* Magnetic field intensity
* Magnetic field viewing film
* Magnetic flow meter
* Magnetic flux
* Magnetic flux quantum
* Magnetic force microscope
* Magnetic form factor
* Magnetic helicity
* Magnetic hyperthermia
* Magnetic impedance
* Magnetic impurity
* Magnetic inductance
* Magnetic inductive coil
* Magnetic ionic liquid
* Magnetic isotope effect
* Magnetic lattice (accelerator)
* Magnetic lens
* Magnetic levitation
* Magnetic mirror
* Magnetic mirror point
* Magnetic moment
* Magnetic monopole
* Magnetic nanoparticles
* Magnetic particle imaging
* Magnetic photon
* Magnetic pole strength
* Magnetic pressure
* Magnetic properties
* Magnetic property
* Magnetic quantum number
* Magnetic reactance
* Magnetic reconnection
* Magnetic refrigeration
* Magnetic reluctance
* Magnetic resonance force microscopy
* Magnetic resonance imaging
* Magnetic sail
* Magnetic scalar potential
* Magnetic semiconductor
* Magnetic separation
* Magnetic structure
* Magnetic susceptibility
* Magnetic tension force
* Magnetic translation
* Magnetic vector potential
* Magnetic water treatment
* Magnetism
* Magnetization
* Magnetization dynamics
* Magnetization reversal by circularly polarized light
* Magnetization transfer
* Magnetized target fusion
* Magneto-optic Kerr effect
* Magneto-optic effect
* Magneto-optical trap
* Magnetoception
* Magnetochemistry
* Magnetocrystalline anisotropy
* Magnetogastrography
* Magnetogram
** Solar magnetogram
* Magnetogravitic tensor
* Magnetogravity wave
* Magnetohydrodynamic drive
* Magnetohydrodynamics
* Magnetohydrodynamics (journal)
* Magnetometer
** Magnetometer § Survey magnetometers
* Magnetomotive force
* Magnetopause
* Magnetoresistance
* Magnetorheological finishing
* Magnetorheological fluid
* Magnetorotational instability
* Magnetosome
* Magnetosphere
* Magnetosphere chronology
* Magnetosphere of Jupiter
* Magnetosphere particle motion
* Magnetospheric electric convection field
* Magnetospheric eternally collapsing object
* Magnetostatics
* Magnetostriction
* Magnetotactic bacteria
* Magnetotaxis
* Magnifying transmitter
* Magnitude (astronomy)
* Magnon
* Magnonics
* Magnus effect
* Mahmoud Hessabi
* Mains hum
* Mainz Microtron
* Major actinide
* Majorana Prize
* Majorana equation
* Majorana fermion
* Majoron
* Majumdar–Ghosh model
* Maki–Nakagawa–Sakata matrix
* Makoto Kobayashi (physicist)
* Malament–Hogarth spacetime
* Malcolm Beasley
* Malcolm Perry (physicist)
* Malleability
* Malter effect
* Mandelstam variables
* Mandrel wrapping
* Manfred R. Schroeder
* Manfred Wagner
* Manfred von Ardenne
* Manhattan Project
* Mani Lal Bhaumik
* Manifest covariance
* Manipulation of atoms by optical field
* Manne Siegbahn
* Manning formula
* Mannque Rho
* Mantle convection
* Manuel António Gomes
* Manuel Mateus Ventura
* Manuel Sandoval Vallarta
* Many-body problem
* Many-body theory
* Many-worlds interpretation
* Marangoni effect
* Marangoni number
* Marc-Auguste Pictet
* Marc A. Kastner
* Marc Henneaux
* Marcel Audiffren
* Marcel Brillouin
* Marcel Grossmann
* Marcel J. E. Golay
* Marcel Schein
* Marcela Carena
* Marcello Pirani
* Marcelo Damy
* Marcelo Gleiser
* Marchenko equation
* Marcia McNutt
* Marcia Neugebauer
* Marcos Moshinsky
* Marcus Birkenkrahe
* Marcus O'Day
* Marek Gazdzicki
* Marek Huberath
* Margaret Eliza Maltby
* Margaret Geller
* Margaret Hamilton (scientist)
* Margaret MacVicar
* Margaret Murnane
* Margaret Wertheim
* Margherita Hack
* Marginal stability
* Margolus–Levitin theorem
* Marguerite Perey
* Maria Ardinghelli
* Maria Goeppert-Mayer
* Maria Spiropulu
* Marian Danysz
* Marian Smoluchowski
* Mariano Gago
* Marie Alfred Cornu
* Marie Curie
* Marietta Blau
* Marijan Šunjić (physicist)
* Marin (wind)
* Marin Getaldić
* Marin Soljačić
* Mario Acuña
* Mario Ageno
* Mario Bunge
* Mario Garavaglia
* Mario Livio
* Mariotte's bottle
* Maritime Research Institute Netherlands
* Marjorie Williamson
* Mark Adler
* Mark B. Wise
* Mark Birkinshaw
* Mark Boslough
* Mark Buchanan
* Mark D. Maughmer
* Mark G. Kuzyk
* Mark G. Raizen
* Mark I (detector)
* Mark Inghram
* Mark Muir Mills
* Mark Newman
* Mark Oliphant
* Mark Reed (physicist)
* Mark Trodden
* Mark Welland
* Markus Aspelmeyer
* Markus Greiner
* Marlan Scully
* Marshall Rosenbluth
* Marshall Stoneham
* Martin A. Pomerantz
* Martin A. Uman
* Martin Bojowald
* Martin David Kruskal
* Martin Deutsch
* Martin Gutzwiller
* Martin Knudsen
* Martin Kutta
* Martin Lewis Perl
* Martin Lowry
* Martin Pope
* Martin Rees
* Martin Rocek
* Martin Ryle
* Martin Schadt
* Martin Tajmar
* Martin Walt
* Martin van Marum
* Martinus J. G. Veltman
* Marvin D. Girardeau
* Marvin L. Cohen
* Marvin Leonard Goldberger
* Mary K. Gaillard
* Masatoshi Koshiba
* Masatsugu Suzuki
* Masayuki Kikuchi
* Maser
* Mason equation
* Mass
* Mass-to-charge ratio
* Mass attenuation coefficient
* Mass chromatogram
* Mass concentration (astronomy)
* Mass distribution
* Mass flow
* Mass flow meter
* Mass flow rate
* Mass flow sensor
* Mass flux
* Mass gap
* Mass generation
* Mass in general relativity
* Mass in special relativity
* Mass matrix
* Mass number
* Mass properties
* Mass ratio
* Mass segregation
* Mass spectrometry
* Mass spectrometry data format
* Mass spectrum
* Mass transfer
* Massimo Porrati
* Massive compact halo object
* Massive gravity
* Massive particle
* Massless particle
* Mass–energy equivalence
* Mass–luminosity relation
* Master equation
* Masud Ahmad
* Material derivative
* Material dispersion coefficient
* Material physics
* Material point method
* Material properties (thermodynamics)
* Materials (journal)
* Materials Chemistry and Physics
* Materials Research Science and Engineering Centers
* Materials Science Citation Index
* Materials Science and Engineering R
* Materials and Structures
* Materials science
* Materials testing reactor
* Mathematical descriptions of opacity
* Mathematical descriptions of physical laws
* Mathematical descriptions of the electromagnetic field
* Mathematical formulation of quantum mechanics
* Mathematical models in physics
* Mathematical physics
* Mathematical universe hypothesis
* Mathematics of general relativity
* Mathias Fink
* Mathieu transformation
* Matrix-assisted laser desorption/ionization
* Matrix isolation
* Matrix mechanics
* Matrix string theory
* Matrix theory (physics)
* Mats Hillert
* Mattauch isobar rule
* Matter
* Matter-dominated era
* Matter wave
* Matthew Kleban
* Matthew Koss
* Matthew Luckiesh
* Matthew Sands
* Matthias Staudacher
* Mattis–Bardeen theory
* Matvei Petrovich Bronstein
* Maupertuis' principle
* Maurice Allais
* Maurice Anthony Biot
* Maurice Couette
* Maurice Ewing
* Maurice Goldhaber
* Maurice Hill (geophysicist)
* Maurice Karnaugh
* Maurice Pryce
* Maurice Wilkes
* Maurice Wilkins
* Maurice de Broglie
* Mauritius Renninger
* Maw-Kuen Wu
* Max Abraham
* Max Born
* Max Born Award
* Max Cosyns
* Max Delbrück
* Max G. Lagally
* Max Jammer
* Max Krook
* Max Perutz
* Max Planck
* Max Planck Institute for Biophysics
* Max Planck Institute of Microstructure Physics
* Max Planck Institute for Nuclear Physics
* Max Planck Institute for the Science of Light
* Max Planck Institute of Plasma Physics
* Max Planck Medal
* Max Q
* Max Steenbeck
* Max Tegmark
* Max Trautz
* Max Valier
* Max Wien
* Max von Laue
* Maximilian Hell
* Maximilien Toepler
* Maximum bubble pressure method
* Maximum density
* Maximum entropy probability distribution
* Maximum entropy thermodynamics
* Maximum power transfer theorem
* Maximum sustained wind
* Maximus von Imhof
* Maxwell's demon
* Maxwell's equations
* Maxwell's equations in curved spacetime
* Maxwell's thermodynamic surface
* Maxwell–Bloch equations
* Maxwell bridge
* Maxwell coil
* Maxwell construction
* Maxwell material
* Maxwell relations
* Maxwell speed distribution
* Maxwell stress tensor
* Maxwell–Boltzmann distribution
* Maxwell–Boltzmann statistics
* Maxwell–Stefan diffusion
* Maxwell–Wagner–Sillars polarization
* Mayak
* Mazuku
* McCumber relation
* McLeod gauge
* McStas
* Mean anomaly
* Mean field theory
* Mean flow
* Mean free path
* Mean free time
* Mean inter-particle distance
* Mean radiant temperature
* Measure-preserving dynamical system
* Measure (physics)
* Measurement
* Measurement Science and Technology
* Measurement in quantum mechanics
* Measurement problem
* Measurement uncertainty
* Measurements of neutrino speed
* Mechanical advantage
* Mechanical efficiency
* Mechanical energy
* Mechanical equilibrium
* Mechanical equivalent of heat
* Mechanical explanations of gravitation
* Mechanical filter
* Mechanical metamaterial
* Mechanical probe station
* Mechanical resonance
* Mechanical similarity
* Mechanical singularity
* Mechanical splice
* Mechanical traveller
* Mechanical wave
* Mechanician
* Mechanics
* Mechanics of structures
* Mechanoluminescence
* Mediator family
* Medical physics
* Medical radiography
* Medical ultrasonography
* Medium Energy Ion Scattering Facility
* Medium frequency
* MeerKAT
* Mega Ampere Spherical Tokamak
* Megalethoscope
* Megasonic cleaning
* Megatsunami
* Megavoltage X-rays
* Meghnad Saha
* Mehdi Golshani
* Mehran Kardar
* Meinhard E. Mayer
* Meissner effect
* Meissner state
* Meissner–Ochsenfeld effect
* Meitner–Hupfeld effect
* Melba Phillips
* Melde's experiment
* Melissa Franklin
* Melting
* Melting point
* Melville S. Green
* Melvin B. Gottlieb
* Melvin Lax
* Melvin Mooney
* Melvin Schwartz
* Membrane-introduction mass spectrometry
* Membrane (M-theory)
* Membrane analogy
* Membrane mirror
* Membrane paradigm
* Memristor
* Menas Kafatos
* Mendel Sachs
* Mendeleev's predicted elements
* Meniscus (liquid)
* Menyhért Palágyi
* Mercury-in-glass thermometer
* Mercury laser
* Merle Randall
* Merle Tuve
* Mermin–Wagner theorem
* Meron (physics)
* Merrill Skolnik
* Meshfree methods
* Mesocrystal
* Mesogen
* Meson
* Meson spectroscopy
* Mesonic molecule
* Mesoscopic
* Mesoscopic physics
* Mesoscopic scale
* Meta-material cloak
* Meta-materials cloak
* Meta material
* Meta materials
* Metadynamics
* Metafluid dynamics
* Metal
* Metal-induced gap states
* Metal K-edge
* Metal L-edge
* Metalizing
* Metallic crystal
* Metallic hydrogen
* Metallic microlattice
* Metallicity
* Metallizing
* Metal–insulator transition
* Metamagnetism
* Metamaterial
* Metamaterial absorber
* Metamaterial antenna
* Metamaterial antennas
* Metamaterial cloaking
* Metamaterial cloaking device
* Metamaterial cloaking devices
* Metamaterial cover
* Metamaterial invisibility
* Metamaterial lens
* Metamaterial microwave cloak
* Metamaterials
* Metamaterials: Physics and Engineering Explorations
* Metamaterials: physics and engineering explorations
* Metamaterials: physics and engineering explorations.
* Metamaterials (journal)
* Metamaterials Handbook
* Metamaterials cloak
* Metamaterials cloaking
* Metamaterials cloaking device
* Metamaterials cloaking devices
* Metamaterials invisibility
* Metamaterials physics and engineering explorations
* Metamaterials physics and engineering explorations.
* Metastability
* Meteoritical Society
* Meteorology
* Meteosat visible and infrared imager
* Meteotsunami
* Metering pump
* Methane clathrate
* Method of characteristics
* Method of image charges
* Method of images
* Methods of detecting extrasolar planets
* Metre per second squared
* Metric signature
* Metric system
* Metric tensor (general relativity)
* Metrogon
* Metrologia
* Metropolis light transport
* Michael A. O'Keefe
* Michael Aizenman
* Michael Atiyah
* Michael Berry (physicist)
* Michael Coey
* Michael Creutz
* Michael Duff (physicist)
* Michael F. Shlesinger
* Michael Faraday
* Michael Fisher
* Michael Foale
* Michael Green (physicist)
* Michael H. Hart
* Michael Heller (professor/priest)
* Michael Hochberg
* Michael Kelly (physicist)
* Michael L. W. Thewalt
* Michael Levitt
* Max Munk
* Michael McKubre
* Michael Pepper
* Michael Perrin
* Michael Peskin
* Michael R. Anastasio
* Michael R. Douglas
* Michael Radaković
* Michael Rossmann
* Michael Rowan-Robinson
* Michael S. Longuet-Higgins
* Michael Schoenberg
* Michael Tinkham
* Michael Turner (cosmologist)
* Michael Woolfson
* Michal Lipson
* Michał Heller
* Michał Horodecki
* Michel Ter-Pogossian
* Michel parameters
* Michele Besso
* Michele Mosca
* Michele Parrinello
* Michelson interferometer
* Michelson stellar interferometer
* Michelson–Gale–Pearson experiment
* Michelson–Morley experiment
* Michiel B.M. van der Klis
* Michio Kaku
* Micro-g environment
* Micro-pulling-down
* MicroFUN
* MicroMegas detector
* Micro SPIDER
* Micro black hole
* Micro perforated plate
* Microactuator
* Microbarom
* Microbarometer
* Microbolometer
* Microburst
* Microcanonical ensemble
* Microchannel plate detector
* Microcosm (CERN)
* Microelectromechanical system oscillator
* Microfluidics
* Microlensing Observations in Astrophysics
* Microlift glider
* Micromagnetics
* Microphotonics
* Microphysics
* Microplasticity
* Microquasar
* Microrheology
* Microscope
* Microscopic scale
* Microscopy Society of America
* Microstate (statistical mechanics)
* Microstate continuum
* Microtron
* Microviscosity
* Microvoid coalescence
* Microwave
* Microwave-metamaterial cloak
* Microwave Imaging Radiometer with Aperture Synthesis
* Microwave Theory and Techniques, IEEE Transactions on
* Microwave and Guided Wave Letters
* Microwave and Guided Wave Letters, IEEE
* Microwave and Optical Technology Letters
* Microwave engineering
* Microwave link
* Microwave metamaterial cloak
* Microwave plasma
* Microwave power transmission
* Microwave radio relay
* Microwave radiometer
* Microwave transmission
* Mictomagnetism
* Middle World
* Mie scattering
* Mieczysław Wolfke
* Migma
* Miguel A. Fernández Sanjuán
* Miguel Alcubierre
* Miguel Ángel Virasoro (physicist)
* Miguel José Yacamán
* Mihail Roco
* Mihajlo Idvorski Pupin
* Mihalis Dafermos
* Mike Morris (physicist)
* Mikhail Kovalchuk
* Mikhail Lavrentyev
* Mikhail Lomonosov
* Mikhail Molodenskii
* Mikhail Ostrogradsky
* Mikhail Sadovsky
* Mikhail Shifman
* Mikhail Shultz
* Mikheyev–Smirnov–Wolfenstein effect
* Milagro (experiment)
* Milan Damnjanović (physicist)
* Milan Kurepa
* Milan Vukcevich
* Mild-slope equation
* Mildred Allen
* Mildred Dresselhaus
* Milesian school
* Mileva Marić
* Millennium Prize Problems
* Millennium Run
* Miller index
* Millisecond pulsar
* Milne model
* Miloslav Valouch
* Milton A. Rothman
* Milton Feng
* Milton S. Livingston
* Milton S. Plesset
* Milton Van Dyke
* Milutin Milanković
* Mineral physics
* Minh Quang Tran
* Mini-magnetospheric plasma propulsion
* MiniBooNE
* MiniGrail
* Miniature neutron source reactor
* Minimal Supersymmetric Standard Model
* Minimal models
* Minimal subtraction scheme
* Minimum Ionizing Particle
* Minimum audibility curve
* Minimum deviation
* Minimum total potential energy principle
* Minkowski diagram
* Minkowski space
* Minkowski–Bouligand dimension
* Minority interpretations of quantum mechanics
* Minto wheel
* Minuano
* Minute Physics
* Mioara Mugur-Schächter
* Mir (lens)
* Mirage of astronomical objects
* Mirau interferometer
* Miroslav Žamboch
* Mirror
* Mirror Fusion Test Facility
* Mirror furnace
* Mirror matter
* Mirror photon
* Mirror symmetry (string theory)
* Misalignment mechanism
* Misner space
* Missile Datcom
* Missing energy
* Mist
* Mistral (wind)
* Misnay–Schardin effect
* Mitchell Feigenbaum
* Mitsutaka Fujita
* Mixed/dual cycle
* Mixed anomaly
* Mixed dark matter
* Mixing (physics)
* Mixing length model
* Mixing paradox
* Mixing ratio
* Mixmaster dynamics
* Mixmaster universe
* Mixture theory
* Mm'-type filter
* MoEDAL experiment
* MoL
* Mobile Anisotropy Telescope
* Mode-locking
* Mode-stirred chamber
* Mode volume
* Model building (particle physics)
* Model photosphere
* Model solid approximation
* Modelling and Simulation in Materials Science and Engineering
* Modern Physics and Ancient Faith
* Modern physics
* Modern searches for Lorentz violation
* Modified Newtonian dynamics
* Modified models of gravity
* Modular Neutron Array
* Modular invariance
* Modular ocean model
* Modulated ultrasound
* Modulation sphere
* Modulational instability
* Moduli (physics)
* Moens–Korteweg equation
* Moffat distribution
* Mohammad Aslam Khan Khalil
* Mohammad Khorrami (physicist)
* Mohr's circle
* Mohsen Fakhrizadeh-Mahabadi
* Moire deflectometry
* Moiré pattern
* Moisey Markov
* Moisture sorption isotherm
* Mole (unit)
* Molecular Hamiltonian
* Molecular Physics (journal)
* Molecular beam
* Molecular beam epitaxy
* Molecular chaos
* Molecular diffusion
* Molecular dipole moment
* Molecular dynamics
* Molecular electronic transducers
* Molecular field
* Molecular mechanics
* Molecular motor
* Molecular orbital
* Molecular physics
* Molecular radiation
* Molecular scale electronics
* Molecular sieve
* Molecular tagging velocimetry
* Molecular term symbol
* Molecular vibration
* Molecule
* Molecule-based magnets
* Molière radius
* Molniya orbit
* Molten-Salt Reactor Experiment
* Molten salt reactor
* Moment (physics)
* Moment map
* Moment of inertia
* Momentum
* Momentum diffusion
* Momentum operator
* Momentum space
* Momentum theory
* Momentum thickness
* Momentum transfer
* Monatomic gas
* Monin–Obukhov length
* Monochromatic electromagnetic plane wave
* Monoclinic crystal system
* Monocular
* Monoisotopic mass
* Monolayer
* Monopole, Astrophysics and Cosmic Ray Observatory
* Monster (physics)
* Monte Carlo N-Particle Transport Code
* Monte Carlo method
* Monte Carlo method in statistical physics
* Montonen–Olive duality
* Montreal Laboratory
* Moo-Young Han
* Moody chart
* Moon dog
* Moonbow
* Mooney–Rivlin solid
* Moonlight
* Mordehai Milgrom
* Morikazu Toda
* Morison equation
* Morphology-dependent resonance
* Morse potential
* Morten Bo Madsen
* Morton Gurtin
* Morton number
* Moseley's law
* Moses Blackman
* Moses H. W. Chan
* Moshe Shapiro
* Motion-triggered contact insufficiency
* Motion (physics)
* Motion graphs and derivatives
* Motional narrowing
* Motionless electromagnetic generator
* Motonori Matuyama
* Mott insulator
* Mott problem
* Mott scattering
* Mott transition
* Mottness
* Mousetrap car
* Moving frame
* Moving magnet and conductor problem
* Moving shock
* Moyal bracket
* Mpemba effect
* Mu problem
* Mueller calculus
* Muffin-tin approximation
* Muhammad Hafeez Qureshi
* Multi-angle light scattering
* Multi-configuration time-dependent Hartree
* Multi-configurational self-consistent field
* Multi-object APO Radial Velocity Exoplanet Large-area Survey
* Multi-wavelength anomalous dispersion
* Multiangle light scattering
* Multiferroics
* Multipaction
* Multipactor effect
* Multipath interference
* Multiphase flow
* Multiphoton lithography
* Multiphysics
* Multiphysics Methods Group
* Multiple-scale analysis
* Multiple histories
* Multiple isomorphous replacement
* Multiplet
* Multiplicative quantum number
* Multipole expansion
* Multipole moment
* Multipurpose Applied Physics Lattice Experiment
* Multiscale modeling
* Multiverse
* Muneer Ahmad Rashid
* Munir Ahmad Khan
* Munir Nayfeh
* Munroe effect
* Muon
* Muon-catalyzed fusion
* Muon capture
* Muon collider
* Muon neutrino
* Muonium
* Murray Batchelor
* Murray Gell-Mann
* Museum of Optical Technologies
* Mushroom cloud
* Musical acoustics
* My Inventions: The Autobiography of Nikola Tesla
* Myriam Sarachik
* Myron L. Good
* Myron Samuel Malkin
* Mysterious duality
* Mária Telkes
* Mário Schenberg
* Mössbauer effect
* Mössbauer spectroscopy
* Møller scattering
* Mārcis Auziņš