| MS Freedom of the Seas | MS Freedom of the Seas |
| MS Queen Victoria | MS Queen Victoria |
| MS-DOS | MS-DOS |
| MSc | mestre em ciências |
| MSL | Nível médio das águas do mar |
| MSN | MSN |
| MSN Hotmail | MSN Hotmail |
| MSN Messenger | MSN Messenger |
| MSN TV | Web TV |
| MSO Word | MSO Word |
| Msta River | Rio Msta |
| Mstislav | Mstsislaw |
| Mstislav Rostropovich | Mstislav Rostropovich |
| Mstsislaw | Mstsislaw |
| Mstsislaw Voivodeship | Voivodia de Mścisław |
| MSV Duisburg | Duisburgo |
| MSV-Arena | MSV-Arena |
| Mswati III of Swaziland | Mswati III da Suazilândia |
| MSX | MSX |
| MTA | Metro de Boston |
| Mtatsminda Pantheon | Panteão de Roma |
| MtDNA‚ mitochondrial DNA | DNA mitocondrial |
| MTK Hungária FC | MTK FC |
| MTV | MTV |
| MTV Flux | MTV Flux |
| MTV Movie Awards | MTV Movie Awards |
| MTV Russia | MTV |
| MTV Thailand | MTV |
| MTV Unplugged | Acústico MTV |
| MTV Unplugged in New York | MTV Unplugged in New York |
| MTV Video Music Awards | MTV Video Music Awards |
| Mtwara | Mtwara |
| Mtwara Region | Mtwara |
| Mu Arae | Mu Arae c |
| Mu Ko Ang Thong National Park | Ang Thong |
| Mu Online | Mu Online |
| Mu-recursive function | Recursividade |
| MUA | Cliente de e-mail |
| Muammar al-Gaddafi | Muammar al-Gaddafi |
| Muaskar | Muaskar |
| Muay Thai | Muay Thai |
| Mubarak Al-Kabeer | Mubarak Al-Kabeer |
| Muc | Munique |
| Mucc | Mucc |
| much | bem |
| much ado about nothing | muito barulho por nada |
| much as | por mais que |
| Much Wenlock | Wenlock |
| Mucia Tertia | Mucia Tertia |
| muck | esterco |
| muck out | limpar |
| muck up | sujar |
| muck-water | muck-água |
| muckheap | monte de esterco |
| muckhill | monte de esterco |
| mucky | sujo |
| Mucormycosis | Mucormicose |
| Mucosa-associated lymphoid tissue | Tecido linfóide associado à mucosa |
