- M ... M45
- M47 ... Maathai, Wangari
- Maathai, Wangari Muta ... macaronic
- macaronic poetry ... MacDonald, James Ramsay
- MacDonald, Jeanette ... MacGyver
- Mach cone ... Machito
- Machkund Lake ... MacKillop, Blessed Mary
- MacKillop, Mary Helen ... Mâcon, Council of
- Macon, Dave ... Macropus giganteus
- Macropus parryi ... Madali Khan
- Madama Butterfly ... Mademoiselle de Maupin
- Mademoiselle Pogany ... Madiun Affair
- Madjedbebe ... Madrid Codex 8937
- Madrid Conference ... Maetsuyker, Joan
- Maeve ... Magellanic penguin
- Magelona ... Magician’s Assistant, The
- Magician’s Elephant, The ... magnetic flux
- magnetic flux density ... magnification
- Magnificent Ambersons, The ... Magnyfycence
- Mago ... Mahākāla
- Mahakam River ... Mahaweli River
- mahayajna ... Maḥmūd, Shihāb-al-Dīn
- Maḥmūdiyyah Canal ... Maiduguri
- Maienfeld ... Maine State Seminary
- Maine System, University of ... Maitre de la Morte de Marie
- maitre de requêtes ... major premise
- major premise, fallacy of illicit ... make-up
- Makeba, Miriam ... Maktoum dynasty
- Maktoum, Rāshid ibn Saʿīd, Sheikh Āl ... Malakbel
- Malakhov ... Malayan sun bear
- Malayan tapir ... maleficio de la mariposa, El
- Malegaon ... Malik ʿAmbar of Ahmadnagar
- Malik, Adam ... Mallophaga
- Mallorca ... Malta College of Arts, Science, and Technology
- Malta fever ... Malykovka
- Malyshev, S. I. ... Mammootty
- mammoth ... Man in the Open Air
- Man in the Red Coat, The ... Man’s Nature is Evil
- Man’s Place in Nature ... Manasseh
- Manasseh ... Mandaic language
- Mandakini ... Mandingo empire
- Mandingue Plateau ... manganese
- manganese bronze ... Manhattan Nights
- Manhattan Project ... maniple
- maṇipravāḷa ... Mann, Thomas
- Mann, Thomas ... Manrique, Gómez
- Manrique, Jorge ... Mantellidae
- mantelline frog ... Manubo-Blit
- manubrium ... Manzini, Gianna
- Manzoni Family, The ... Maps
- Maps of the Battle of Midway ... Maraj, Onika Tanya
- Marajó Island ... Marburg, Articles of
- Marburg, Colloquy of ... Marchais, George-René-Louis
- Marchais, Georges ... Marcus Lucretius Fronto, House of
- Marcus Opellius Macrinus ... Maret, Hugues-Bernard, Duc De Bassano
- Mareth Line ... marginal distribution
- Marginal Economy ... Maria of Antioch
- Maria Pia Bridge ... Marie-Strümpell arthritis
- Marie-Thérèse d’Autriche ... marine mining
- marine mussel ... Marisol
- Marist Brother ... markaz
- Markaz Al-Mamlakah ... Markward, Rose
- Markwayne Mullin ... Maroni River
- Maronite church ... Marriage of Figaro, The
- Marriage of Heaven and Hell, The ... Marseillaise, La
- Marseillaise, La ... Marshall, Thurgood
- Marshall, Winston ... Martí, José Julián
- Martial ... Martin, Marie-Françoise-Thérèse
- Martin, Mary ... Martinson, Harry
- Martinson, Harry Edmund ... Marx, Gertie F.
- Marx, Gertie Florentine ... Maryland, My Maryland
- Maryland, University of ... Masdevallia
- Masefield, John ... Maskelyne, Nevil
- Maskhadov, Aslan ... Masri, Abu Mohamed al-
- Maṣrif al-ʿArabī lil-Tanmiyah al-Iqtiṣādī fī Ifrīqiyyā, Al- ... Massalia
- Massamba-Débat, Alphonse ... master colony-stimulating factor
- Master E.S. ... Masuda
- Masukagami ... Matchbox
- matched filter ... mathematical nominalism
- mathematical physics ... Matilda of Canossa
- Matilda Of Flanders ... Matshangana-tsonga
- Matshikiza, Todd ... Matthes, Roland
- Mattheson, Johann ... Matzo, Emma
- matzoh ... Maurer, Ueli
- Mauresmo, Amélie ... Mavrokordatos, Alexander
- Mavrokordátos, Aléxandros ... maximin value
- Maximin, ein Gedenkbuch ... May, William Aaron
- May-Day ... mayflower
- Mayflower Compact ... Mayumba
- Mayurasharman ... maʿamadot
- Maʿān ... McAlmon, Robert Menzies
- McArdle disease ... McClain, Anne Charlotte
- McClanahan, Eddi-Rue ... McCullough Robinson, Colleen
- McCullough, Bernard Jeffrey ... McGill Fortnightly Review
- McGill University ... McKay, Claude
- McKay, David O ... McLeod syndrome
- McLeod, Norman Z. ... McQueen, Alexander
- McQueen, Humphrey ... meadow mouse
- meadow mushroom ... measure of association
- Measure of Man, The ... mechanical system
- mechanical tachometer ... Medeba
- Médecin de campagne, Le ... Medical Inquiries and Observations upon the Diseases of the Mind
- medical insurance ... médico de su honra, El
- Medieval Cities ... Medium Cool
- medium earth orbit ... Meet the Browns
- Meet the Fockers ... megaphone
- Megaphragma ... Mehmed II
- Mehmed II ... Meiningen Company
- Meiningen Court Theater Troop ... mela
- Mela, Pomponius ... Melbourne Public Library
- Melbourne rules football ... Mellan, Claude
- mellay ... melt
- Melt ... Memoir and Poems of Phillis Wheatley
- Memoir on the Pearly Nautilus ... Memories of the Ford Administration: A Novel
- Memories of Underdevelopment ... Mena, Pedro de
- Menabé ... Mendieta, Ana
- Mendieta, Ana Maria ... Menifee
- Menil Collection ... Menschenhirn, Das
- Menschenwee ... Meotoiwa
- MEP ... merchandise credit insurance
- Merchandise Mart ... mercury(I) chloride
- mercury(II) chloride ... Meridian
- meridian circle telescope ... Merode beaker
- Meroe ... Merseburg Charms
- Mersen, Treaty of ... Meschke, Michael
- Mesechinus ... mesophase
- mesophile ... Messenia
- Messenia, Gulf of ... Metabolist school
- metabolite ... metamathematical formalism
- metamathematics ... Metaxya lanosa
- Metaxya rostrata ... methanol
- Methanosarcina ... methylene dichloride
- methylene green ... Metropolitan Museum of Art
- Metropolitan Museum of Art Costume Institute Benefit ... Mexican elder
- Mexican Empire ... Meyer, Joseph
- Meyer, Joyce ... Mgungundlovu
- MH-2 ... Micatin
- Micawber, Wilkins ... Michelet, Jules
- Michelia champaca ... micro topography
- Micro-cap and penny stocks: What you need to know before you invest ... microfilaria
- microfilariae ... microscopy
- Microscripts, The ... mid-ocean-ridge basalt
- mid-oceanic ridge ... Middle Passage
- middle path ... Midi i en Jœrntid
- Midi-Pyrénées ... Midwich Cuckoos, The
- Midwife Act ... mignonette, garden
- mignonette-vine ... Miknasah
- miko ... mile race
- mile run ... Military Frontier
- military government ... Mill’s methods
- Mill, Hugh Robert ... Miller, Frank
- Miller, George ... millimetre
- Millin, Sarah Gertrude ... Milo of Crotona
- Milo River ... Mimir
- Mímisbrunnr ... Minase sangin hyakuin
- Minase Sangin Hyakuin: A Poem of One Hundred Links Composed by Three Poets at Minase ... Miner, Jack
- Miner, John Thomas ... Minh Thai
- minha ... Ministers, Council of
- Ministers, Council of ... Minoan
- Minoan civilization ... Minucius Felix, Marcus
- minuet ... Miracle in Milan
- Miracle in the Evening ... Mirifici Logarithmorum Canonis Descriptio
- Mirim Lagoon ... Mis Primeras Grabaciones
- Mis-Adventures of Awkward Black Girl, The ... Mismeasure of Man, The
- Misnagid ... Missing Link
- Missing Links ... Mississippi v. Johnson
- Mississippi Valley ... mitama-shiro
- Mitanni ... Mithridates, oder allgemeine Sprachenkunde
- Mithridates: de differentis linguis ... Mittag-Leffler, Magnus Gösta
- Mittal, Lakshmi ... Miyabe maple
- Miyagawa Chōshun ... MLR
- MLS ... Moana
- Moanda ... Moche language
- mochi ... Modena, Leone
- Modena, Tommaso da ... Modernismo
- Modernismo ... Moen, John
- Moena Eiland ... Moḥammad Shāh
- Moḥammad Shams al-Dīn Ḥāfiz ... Moiseyev, Igor Aleksandrovich
- Moisiu, Alfred ... moldboard
- Moldbug, Mencius ... Molfetta
- Moliant Cadwallon ... Molto Mario
- Molucca Sea ... Monaco, Principality of
- Monaco, Principauté de ... Mondays in the Sun
- Monde Arabe, Institut du ... Mongol Altayn Nuruu
- Mongol Bank ... Monkees, The
- Monkees, the ... Monoclonius
- monocoque ... monorhyme
- monosaccharide ... Monsieur Vincent
- Monsieur, Peace of the ... Montagu, Edward, 1st Earl of Sandwich
- Montagu, Edwin Samuel ... Montebello, Jean Lannes, Duke de
- Montebourg, Arnaud ... Montforts, The
- Montgelas de Garnerin, Maximilian Joseph, Graf von ... Montreal Amateur Athletic Association
- Montreal Aquarium ... Moody, Essie Mae
- Moody, Helen Wills ... moonquake
- Moonraker ... Moore, Samuel
- Moore, Shelley Wellons ... moral psychology
- Moral Re-Armament ... morbidity
- Morbihan ... Moreno, Lenín
- Moreno, Luisa ... Morgans Hotel
- Morgante ... Morley, Lawrence W.
- Morley, Lewis ... Moroni, Giovanni Battista
- Moronidae ... Morris, Nelson
- Morris, Richard B ... Mort de Louis XIV, La
- Mort le Roi Artu, La ... Morus capensis
- Morus nigra ... Moscow, Treaty of
- Moscow, Treaty of ... moso biwa
- Moso language ... Motacillidae
- Motagua River ... Motherstone
- Motherwell ... motor sports
- motor torpedo boat ... Moulin Rouge!
- Moulin Rouge-La Goulue ... Mount Revelstoke National Park
- Mount Royal University ... Mountain Tajik
- mountain tapir ... mousse
- Moussorgsky, Modest Petrovich ... movie technology
- movie theatre ... Mozabite
- Moẓaffar od-Dīn Shāh ... MPS
- MPS I H ... Mr. Turner
- Mr. Universe ... MSS
- MST ... Muck, Karl
- mucker ... mudskipper
- mudstone ... Muḥammad al-Bāqir
- Muḥammad al-Kanamī ... Muhammadu Wabi I
- Muhammed bin Hamid ... Mukhavyets
- Mukherjee, Bharati ... Mulk, Tāj al-
- mülkiye ... Multi User Dungeon
- multi-chambered stomach ... multiple-arch dam
- multiple-cell thunderstorm ... mummification
- Mumming at Hertford ... mung bean
- Munger ... Munson, Margaret Elizabeth
- Munson, W. A. ... Murad River
- Murad V ... Murders in the Rue Morgue, The
- Murdin, Paul ... Murphy, Annie
- Murphy, Audie ... Murray, Sir Hubert
- Murray, Sir James ... musaddas
- Musae Sioniae ... Musée Guimet
- Musée National d’Histoire et d’Art ... Mushki
- Mushku ... musical criticism
- musical cups ... Muslim World League
- Muslims, Society of ... Mustela putorius eversmanni
- Mustela putorius furo ... Muttra
- Muttrah ... MVP
- MVP ... My Fiancée with Black Gloves
- My Fight with Hersh Rasseyner ... My Sharona
- My Side of the Road ... mycosis
- Mycostatin ... Myocastor coypus
- Myochit Party ... Myrivilis, Stratis
- Myrmarachne formicaria ... Mystery of Edwin Drood, The
- Mystery of Heaven and Earth ... Myzopodidae
- Myzostoma ... Mʾzabite
