- molecular genetics
- misspelling
- missed
- mollusk genus
- money cowrie
- Montezuma cypress
- Mexican swamp cypress
- Monterey cypress
- Mediterranean cypress
- Mexican cypress
- mirror carp
- malignant pustule
- meniscectomy
- mastoidectomy
- moksa
- manic_depressive psychosis
- manic depressive illness
- manic depression
- motorcycling
- misanthropical
- megabat
- minor term
- minor suit
- methylated spirit
- myotome
- mode of action
- military officer
- mental attitude
- military pace
- mental lexicon
- malfunctioning
- medical school
- most excellent
- missippian period
- mission impossible
- missional
- missionary position
- master of a vessel
- moot court
- Masa
- munro
- muckheap
- mudguard
- menurae
- morality play
- medea
- meddlesomeness
- mandarin duck
- message transfer part
- microelectronics