- mutagenesis
- mercantile association
- mallard
- midpoint
- malinowski
- mercantile law
- misestimate
- mandatary
- man of deeds
- martin luther
- man of action
- male offspring
- mightiness
- male internal reproductive organ
- martin scorsese
- mixing faucet
- manufactured home
- muscle spasm
- menorrhagia
- musca volitans
- megalocardia
- melasma
- myoglobinuria
- muscae volitantes
- monocytosis
- meningism
- marsh wren
- metastasize
- metastasise
- marsupial rat
- marsupial mouse
- mentally retarded
- massenet
- masseteric artery
- mathematical group
- malingering
- military installation
- military post
- managership
- messiahship
- moderatorship
- marshalship
- megahertz
- miles per hour
- mortality rate
- megacycle per second
- megacycle
- maori hen
- mathematical relation
- map collection