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  • μm ... M60
  • M60 Patton ... Maba language
  • Maban languages ... MacArthur, J. Roderick
  • MacArthur, James ... Macdonald, Ross
  • Macdonald, Sir Hector ... Machado, Bernardino Luís
  • Machado, Manuel ... MacInnes, Helen Clark
  • MacInnes, Tom ... MacLaren, Archibald
  • Maclaren, Charles ... macquarie pine
  • Macquarie Ridge ... macula
  • macula ... Madariaga y Rojo, Salvador de
  • Madāʾin Ṣāliḥ ... Madhyamagama
  • madhyamagrama ... Madonna lily
  • Madonna of Carmelo and the Souls of Purgatory ... Maebashi
  • Maecenas, Gaius ... Magar
  • magarada ... Magic Island, The
  • Magic Man ... Magnet Cove
  • magnet ring ... magnetometer
  • magnetomotive force ... Magnus Ladulås
  • Magnus Lagabøte ... Mahabodhi Temple
  • Mahabodhi Temple ... Mahāvihāravāsī
  • Mahavira ... Maḥmūd Lodī
  • Maḥmūd Muṣavvīr ... Maidhyoishema
  • Maids of Honour, The ... Maine River
  • Maine State Seminary ... Maitre de la Morte de Marie
  • maitre de requêtes ... Major, André
  • Major, cathedral of la ... Makerere University
  • makeris ... mala educación, La
  • Mala Mara ... Mälar, Lake
  • Mälaren, Lake ... Malcolm, Norman
  • Malcolmpeth ... Mali Federation
  • Mali Hka ... Mälkki, Susanna
  • Malkmus, Stephen ... Malone, Moses
  • Malone, Moses Eugene ... Malus angustifolia
  • Malus baccata ... Mamikonian, Vardan, Saint
  • Mamiya Michio ... Man in Black
  • Man in Full, A ... Man, Fall of
  • Man, Felix H. ... Manaviche River
  • Manawatu River ... mandapa
  • Mandara Mountains ... Mandurah
  • Manduria ... Mangiarotti, Edoardo
  • Mangifera ... Manifesto of Futurism
  • Manifesto of Futurist Sculpture ... Mankato
  • Mankato Glacial Substage ... Manning, Archie
  • Manning, Bernard John ... Mansingh, Sonal
  • mansion ... mantle, planetary
  • Mantle, The ... Manuscript Found in Accra
  • manuscript illumination ... Map Information Office of the United States Geological Survey
  • Map of Misreading, A ... Mara, Gertrud Elisabeth
  • Mara, Ratu Sir Kamisese ... Maravi Empire
  • Marávia highlands ... March Revolution
  • March River ... Marcus Annius Verus
  • Marcus Antonius ... Maréchal, Pierre-Sylvain
  • maréchaussée ... Margherita, La
  • Marghiloman, Alexandru ... Maria II
  • Maria Island ... Marie-Galante
  • Marie-Louise ... marine leech
  • marine limit ... marital exchange
  • marital rape ... Marker, Chris
  • Markerwaard Polder ... Marlborough, John Churchill, 1st Duke of, Marquess of Blandford, Earl of Marlborough, Baron Churchill of Sandridge, Lord Churchill of Eyemouth, Reichsfürst
  • Marlborough, John George Vanderbilt Henry Spencer-Churchill, 11th duke of ... Maroua
  • Maroubra Force ... marriage, nullity of
  • Marriage, The ... marsh hawk
  • marsh helleborine ... Marsilio da Padova
  • Marsilius of Inghen ... Martin B-10 bomber
  • Martin Birck’s Youth ... Martin, Saint
  • Martin, Schön ... Marton, Andrew
  • Martorana, Church of the ... Marx, Karl Heinrich
  • Marx, Leonard ... MAS
  • mas ... Mashhad ʿAlī
  • Mashi River ... Mason City
  • Mason ware ... mass movement
  • mass murder ... Massice, Battle of
  • massicot ... Masterpiece of the Oral and Intangible Heritage of Humanity
  • Masterpiece Theatre ... Matabeleland
  • matachina ... materials salvage
  • materials science ... Mathieu, Claude-Louis
  • Mathieu, Georges ... matrilineal society
  • matriliny ... Matteotti Crisis
  • Matteotti, Giacomo ... Maturin, Charles Robert
  • maturity ... Maupassant, Guy de
  • Maupassant, Henry-René-Albert-Guy de ... Maverick
  • Maverick ... Maximilian IV Joseph
  • Maximilian, Prince of Baden ... May, Robert
  • May, Robert McCredie ... Mayhew, Jonathan
  • Mayhew, Thomas ... Mayweather, Roger
  • mayweed ... maʿase bereshit
  • maʿase Merkava ... McBain, Ed
  • McBrayer, Staley Thomas ... McClintock, Barbara
  • McClintock, Sir Francis Leopold ... McCurdy, J. A. D.
  • McCutchen, Andrew ... McGill University
  • McGill University Hockey Club ... McIntyre, Kalaparusha Maurice
  • McIntyre, Maurice Benford ... McLean, Edward B.
  • McLean, Jackie ... MCP
  • McParland, James ... Mead, Lake
  • Mead, Lawrence ... Mears, Helen
  • Mearsheimer, John J. ... mechanical sound
  • mechanical speech ... Médecin malgré lui, Le
  • Médecin malgré lui, Le ... Medical Officers of American Institutions for Idiotic and Feeble-Minded Persons, Association of
  • medical practice ... Medina
  • Medina Angarita, Isaias ... Medtner, Nikolay
  • Medúlla ... Megaera
  • megafauna ... Megillot
  • megilp ... Meier Helmbrecht
  • Meier, Deborah ... Meitner, Lise
  • meitnerium ... Melanosuchus
  • Melanosuchus niger ... Melinae
  • Melinda and Melinda ... Meloinae
  • Melolontha melolontha ... Memel Statute
  • Memelland ... Memoriale Fratris Walteri de Coventria
  • Memorias de las reynas católicas ... Ménagerie du Jardin des Plantes
  • Menagerie of the Botanical Garden ... Mendovg
  • Mendoza ... meningococcal meningitis
  • meningococcal vaccine ... menstruation
  • Mensur ... meprobamate
  • mepyramine ... Merchant of Venice, The
  • merchant ship ... Mercy d’Argenteau, Florimund, Graf
  • mercy killing ... merit system
  • Merit System Protection Board ... Merovich
  • Merovingian art ... Merthyr Tudfil
  • Merthyr Tydfil ... Meshchera Lowland
  • Meshech ... mesoscaphe
  • mesosiderite ... Messier catalog
  • Messier, Charles ... metal carbonyl
  • metal carbonyl anion ... Metaphysicae cum Geometria Iunctae Usus in Philosophia Naturali, Cuius Specimen I. Continet Monadologiam Physicam
  • metaphysical audism ... Meteor
  • Meteor Crater ... Methodist New Connexion
  • Methodist Pentecostal Union ... metre signature
  • Metre, Treaty of the ... Metzinger, Jean
  • Metzu, Gabriel ... Mexican Workers, Confederation of
  • Mexican, The ... mezuza
  • mezuzah ... Miānwāli
  • Mianyang ... Michaud, Joseph
  • Michaux, André ... Micombero, Michel
  • Micon ... microelectronics
  • microencephaly ... microscopic anatomy
  • microscopic reversibility, principle of ... mid-latitude steppe and desert climate
  • mid-latitude steppe climate ... middle path
  • Middle Permian Series ... Midland
  • Midland ... Mienic languages
  • Miercurea-Ciuc ... migratory phase
  • Miguel ... Mikulski, Barbara
  • Mikulski, Barbara Ann ... Milestone, Lewis
  • Milestones ... military skiing
  • military supply ... Millenary Petition
  • millennial climate variation ... Miller, Mulgrew
  • Miller, Neal E. ... Mills, Bernard Yarnton
  • Mills, Bertram Wagstaff ... Milwaukee Art Museum
  • Milwaukee Braves ... Mina, Mount
  • Minabozho ... mindfulness meditation
  • Mindhunter ... Ming Wuzong
  • Ming Xizong ... mining bee
  • Mining, Academy of ... Minnesota Wild
  • Minnesota, flag of ... Minto, Gilbert Elliot-Murray-Kynynmound, 1st Earl of
  • Minto, Gilbert Elliot-Murray-Kynynmound, 1st earl of, Viscount Melgund of Melgund ... Miracle de Théophile, Le
  • miracle fruit ... Mīrkhwānd
  • mirliton ... Miscellanies
  • miscellany ... misrepresentation
  • Misrepresentations Corrected and Truth Vindicated, in a Reply to the Rev. Mr. Solomon William’s Book ... Mission: Impossible
  • Mission: Impossible II ... Mistaken Identity
  • Mistassini Lake ... Mitchell, Margaret Julia
  • Mitchell, Margaret Munnerlyn ... mitral insufficiency
  • mitral regurgitation ... Mixe-Zoquean
  • Mixe-Zoquean languages ... Mizuho Financial Group, Inc.
  • Mizuki, Shigeru ... Mnevis
  • Mniotilta varia ... Möbius, August Ferdinand
  • Möbius, Karl August ... mode-locking
  • model ... Modern Major-Gineral, The
  • Modern Men and Mummies ... Modou-Fatim
  • Modred ... Mogollon Rim
  • Mogoplistinae ... Mohra
  • Mohri Mamoru ... Mola Vidal, Emilio
  • Moladh Beinn Dóbhrainn ... molecular laser isotope separation
  • molecular lattice ... molokhia
  • Molon ... Mon-Khmer
  • Mon-Khmer languages ... Moncorgé, Jean-Alexis
  • Moncrief, Sidney ... Mongibello
  • Monginevro, Colle del ... Monk, Meredith
  • Monk, Meredith Jane ... monoclinic system
  • monoclonal antibody ... monorhyme
  • Monory, René-Claude-Aristide ... monsignor
  • Monsignor ... Montague, Charles Edward
  • Montague, Richard ... Monteiro, Antonio Mascarenhas
  • Monteith, Robert ... Montgomery plan
  • Montgomery Ward & Co. ... Montreuil
  • Montreuil-sous-Bois ... Moon Deluxe
  • Moon exploration ... Moore, Bernard
  • Moore, Bobby ... Moose Jaw
  • Moose River ... Moran, Bugs
  • Moran, Charles McMoran Wilson, 1st Baron ... More, Kenneth
  • More, Paul Elmer ... Morgan, Arthur E.
  • Morgan, Barbara ... moribana
  • Moribonds, Les ... morning nausea
  • Morning of the Execution of the Streltsy, The ... Morrice dance
  • Morrice, Norman ... Morrison, Jeanette Helen
  • Morrison, Jim ... Mortierellales
  • mortification ... Mosander, Carl Gustaf
  • mosasaur ... Moses, Assumption of
  • Moses, Dorothea Sydney ... Mössbauer effect absorption spectrum
  • Mössbauer effect Doppler-velocity spectrometer ... Mother Night
  • Mother of All Battles ... Motlotheli
  • motmot ... Mottola, Tommy
  • mottramite ... Mount Kenya National Park
  • Mount Kilimanjaro ... mountain paca
  • mountain paper birch ... mouse opossum
  • mouse possum ... movement, range of
  • movement, social ... Moyobamba
  • Moyola of Castledawson, Baron ... MPS I H S
  • MPS I S ... mRNA
  • MRND ... Mu
  • Mu Dan ... mud fever
  • mud hen ... Mugano-Salyan
  • Muggeridge, Edward James ... Muḥammad III
  • Muhammad Mzali ... mujāhadah
  • Mujāhedīn-e Khalq ... mulch tillage
  • Mulde River ... Mullerornis
  • Müllerthal ... multiphase current
  • multiphonics ... mum
  • Mum language ... Mundhir III, al-
  • Mundhir, al- ... Munqidh min aḍ-ḍalāl, al-
  • Munro, Alice ... murābiṭ
  • Mūrābiṭīn ... Murders in the Rue Morgue, The
  • Murdoch, Colin Albert ... Murphy, Brittany
  • Murphy, Charles M. ... Murray, Thomas Randolph, 1st Earl of
  • Murray, William ... musālimah
  • muṣallā ... Museo Arqueológica de Barcelona e Instituto de Prehistoria y Arqueología
  • Museo Cabrera ... Music Drama of the Future, The
  • music education ... mūsim
  • Musin, Ilya Aleksandrovich ... mussurana
  • Mussy-sur-Seine ... mutationism
  • Mutations ... Muẓaffar ad-Dīn Gökburi
  • Muẓaffar al-Dīn Sonqur ... My Boy Lollipop
  • My Brilliant Career ... My Reputation
  • My Ride’s Here ... Mydaus javanensis
  • Mydaus marchei ... Myoida
  • myoinositol ... Myrothamnus
  • Myroxylon pereirae ... Mystical Element of Religion as Studied in Saint Catherine of Genoa and Her Friends, The
  • mystical interpretation ... Mʾzabite
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