| mass production | producción en serie |
| Mass radius relation | Relación masa-radio |
| Mass ratio | Relación de masas |
| mass recreation | actividades recreativas multitudinarias |
| Mass spectrometry | Espectrómetro de masa |
| Mass storage device | Memoria de gran capacidad |
| Mass transfer | Transferencia de masa |
| mass transport | transporte de masa |
| mass-produce | producir en serie |
| Massa | Massa |
| Massa language | Massa |
| Massachusett | Massachusett |
| Massachusetts | Massachusetts |
| Massachusetts General Hospital | Hospital General de Massachusetts |
| Massachusetts Institute of Technology | Instituto Tecnológico de Massachusetts |
| Massachusetts State House | Casa del Estado de Massachusetts |
| Massachusetts Supreme Judicial Court | Corte Suprema Judicial de Massachusetts |
| massacre | matanza |
| Massacre of the Innocents | Día de los Santos Inocentes |
| massage | masaje |
| Massagetae | Masageta |
| Massagno | Massagno |
| Massalfassar | Masalfasar |
| Massalia | Massalia |
| Massamagrell | Masamagrell |
| Massanassa | Masanasa |
| Massari | Massari |
| Massawa | Massawa |
| Masse moléculaire | Masa molecular |
| Massecuite | Diabetes mellitus |
| masseur | masajista |
| masseuse | masajista |
| massif | macizo |
| Massif Central | Macizo Central |
| Massimo Oddo | Massimo Oddo |
| Massiness | Gravedad |
| massive | imponente |
| Massive Attack | Massive Attack |
| Massive blackout in France | Europa estuvo al borde del colapso eléctrico por culpa del apagón |
| Massive earthquakes strike Indonesia | Terremotos mayores sacuden Indonesia |
| Massive galaxy | Galaxia masiva |
