| mrok | oscuridad |
| mroki | oscuridad |
| mrowie | aglomeración |
| mrowiec czarnoczuby | batará crestinegro |
| mrowiec czarnolicy | batará crestado |
| mrowiec luskolicy | batará collarejo |
| mrowiec zalobny | batará luctuoso |
| mrowisko | hormiguero |
| mrozić | helar |
| mroźny | glacial |
| mrugać | parpadear |
| Mrugnięcie | Hacer del ojo |
| mrugnąć | guiñar |
| mrużyć | entrecerrar |
| mrówka | hormiga |
| Mrówka Z | Hormigaz |
| mrówkodzierzb czarnogardly | batará gorginegro |
| mrówkodzierzb falisty | batará ondulado |
| mrówkojad | oso hormiguero |
| Mrówkojad wielki | Myrmecophaga tridactyla |
| Mrówkojadek | Cyclopes didactylus |
| Mrówkojady | Myrmecophagidae |
| Mrówkowate | Formicidae |
| Mrówkożerowate | Myrmecobius fasciatus |
| mrównik | cerdo hormiguero |
| Mrówniki | Orycteropus afer |
| mróz | frío |
| MS | MS |
| MS Athena | Estocolmo |
| MS Emma Mærsk | Emma Mærsk |
| MS Freedom of the Seas | Freedom of the Seas |
| MS Goya | MS Goya |
| MS Steuben | SS General von Steuben |
| MS Wilhelm Gustloff | Hundimiento del barco Wilhelm Gustloff |
| MS-DOS | MS-DOS |
| MS-DOS Editor | Edit |
| MSISDN | Estación móvil de la Red Digital de Servicios Integrados |
| MSN | MSN |
| MSN Messenger | MSN Messenger |
| MSV Arena | MSV-Arena |
| MSV Duisburg | MSV Duisburg |
| Mswati III | Mswati III de Suazilandia |
| MSX | MSX |
| msza | misa |
| Msza C-dur | Misa de la Coronación |
| Msza c-moll | Gran misa en do menor |
| Msza trydencka | Misa tridentina |
| msza za zmarłych | réquiem |
| mszaki | briofitas |
| mszyca | pulgón |
| Mszyce | Aphidoidea |
| Mszycowate | Aphididae |
| Mszywioły | Bryozoa |
| Mt | Mt |
| MT Amoco Cadiz | Amoco Cadiz |
| MT Exxon Valdez | Exxon Valdez |
| MT Prestige | Prestige |
| MTA | Mail transfer agent |
| MTBF | MTBF |
| MtDNA | ADN mitocondrial |
| MTK Hungária Budapeszt | MTK Hungária FC |
| MTS | MTS |
| MTV | MTV |
| MTV Movie Awards | MTV Movie Awards |
| MTV Unplugged | MTV Unplugged |
| MTV Unplugged in New York | MTV Unplugged in New York |
| MTV Video Music Awards | MTV Video Music Awards |
| Mu Online | Mu online |
| MUA | Cliente de correo electrónico |
| Muammar al-Kadafi | Muammar al-Gaddafi |
| Muaskar | Muaskar |
| Mucc | Mucc |
| mucha | mosca |
| Mucha Billa Gatesa | Eristalis gatesi |
| Mucha domowa | Musca |
| Mucha Paula Allena | Eristalis alleni |
| muchomor | amanita |
| Muchomor cesarski | Amanita caesarea |
| Muchomor czerwony | Amanita muscaria |
| Muchomor zielonawy | Amanita phalloides |
| Muchotrzew | Spergularia |
| Muchołówka | Dionaea muscipula |
| Muchołówka szara | Muscicapa striata |
| Muchołówki | Muscicapidae |
| muchówki | dipteros |
| Muckross Abbey | Abadía de Muckross |
| MUD | MUD |
| Mudanjiang | Mudanjiang |
| Muddy Waters | Muddy Waters |
| Mudejar | Mudéjar |
| Mudkip | Mudkip |
| muezin | almuédano |
| muflon | muflón |
| Mufti | Mufti |
| Mufulira | Mufulira |
| Mugen Motorsports | Mugen-Honda Motorsports |
| Muggio | Muggio |
| mugol | muggle |
| Muhadżirowie | Mohajir |
| Muhammad Abdul Aziz | Mohamed Abdelaziz |
| Muhammad Ali | Muhammad Ali |
| Muhammad Ali Jinnah | Muhammad Ali Jinnah |
| Muhammad Chuna uld Hajdalla | Mohamed Khouna Ould Haidalla |
| Muhammad Daud Chan | Mohammed Daud Khan |
| Muhammad ibn Arafa | Mohammed Ben Arafa |
| Muhammad Ibn Battuta | Ibn Battuta |
| Muhammad ibn Musa al-Chuwarizmi | Muhammad ibn Musa al-Jwarizmi |
| Muhammad III | Mohammed III de Marruecos |
| Muhammad Ikbal | Muhammad Iqbal |
| Muhammad IV | Mohammed IV de Marruecos |
| Muhammad Nadżib | Muhammad Naguib |
| Muhammad V | Mohammed V de Marruecos |
| Muhammad VI | Mohamed VI de Marruecos |
| Muhammad Yunus | Muhammad Yunus |
| Muhammad Zahir Chan | Mohammed Zahir Shah |
| Muhu | Muhu |
| Mukowiscydoza | Fibrosis quística |
| Muktada as-Sadr | Muqtada al-Sadr |
| Mulaj Abd al-Hafiz | Abd al-Hafid de Marruecos |
| Mulaj Abd ar-Rahman | Abd ar-Rahman ibn Hicham |
| Mulaj Raszid | Moulay Rachid |
| Mulaj Sulajman | Sulayman de Marruecos |
| Mulak | Odocoileus hemionus |
| Mulberry | Morus |
| mulcz | mantillo |
| Mulegns | Mulegns |
| Mulga | Acacia aneura |
| Mulgara | Dasycercus |
| Mulholland Drive | Mulholland Drive |
| Mulianka | Muliánka |
| Mull | Isla de Mull |
| Mullingar | Mullingar |
| Multicast | Multidifusión |
| Multichannel Multipoint Distribution Service | MMDS |
| MultiColor Graphics Array | Multicolor Graphics Adapter |
| MULTICS | Multics |
| Multimedia | Multimedia |
| MultiMedia Card | Multi Media Card |
| Multimedia Home Platform | Multimedia Home Platform |
| Multimedia Messaging Service | Multimedia Messaging System |
| Multimetr | Multímetro |
| Multiple independently targetable reentry vehicle | Vehículo de reentrada múltiple e independiente |
| Multiplekser | Multiplexor |
| Multipleksowanie | Multiplexación |
| multiplikacja | multiplicación |
| Multiprotocol Label Switching | MPLS |
| Multipurpose Internet Mail Extensions | Multipurpose Internet Mail Extensions |
| Multiwibrator | Multivibrador |
| Multizbiór | Multiconjunto |
| Mumakile | Olifante |
| Mumbaj | Mumbai |
| Mumia | Momia |
| Mumia Abu-Jamal | Mumia Abu-Jamal |
| Mumij Troll | Mumiy Troll |
| Muminki | Moomin |
| Munch-museet | Museo Munch |
| Munchkin | Munchkin |
| Mund | Mund |
| Mundilfari | Mundilfari |
| mundur | uniforme |
| mundurek | uniforme |
| Mundurek szkolny | Uniforme escolar |
| Mundżak | Muntiacus muntjak |
| Mundżak chiński | Muntiacus reevesi |
| Mungo Park | Mungo Park |
| Municipal Gwatemala | Club Social y Deportivo Municipal |
