- monster from the deep
- marine corrosion
- Meet the Feebles
- major bollocking
- mega event
- megaampere , MA
- megabecquerel , MBq
- mega boobs
- mega cheeky
- megaelectron volt, MeV
- megafauna
- megagauss , MG
- megagram , Mg
- megagramme , Mg
- megagray , MGy
- megahenry , MH
- megacycle , Mc
- megahertz , MHz
- Megaira
- megajoule , MJ
- megakaryoblast
- megakaryoblasts
- megakaryoblastic leukaemia
- megakaryoblastic leukemia
- megakaryocytes
- megalencephaly
- megaloencephaly
- megaliths
- megalithic man
- megalithic culture
- megaloblasts
- megalocornea , MGCN
- megameter , Mm
- megametre , Mm
- Megamind
- megapascal , MPa
