miss - mult
- missed block
- missing baggage (luggage)
- mist
- mistuning
- mitre
- mitre joint
- mitred joint
- mixed carloads
- mixed cold
- mixed consignment
- mixed coupling
- mixed Flow turbine
- mixed hot
- mixed lighting
- mixed tariff
- mixed traffic
- mixed train
- mixed-gauge point
- mixed-gauge switch
- mixed-gauge tracks
- mixed-in-place method
- mixer circuit
- mixer tube
- mixing cycle
- mixing en route
- mixing in transit
- mixing nozzle
- mixing plant
- mixture ratio
- mixture turbine
- mo-permalloy
- mobile liquid
- mobile load
- mobile loader
- mobile petrol tank
- mobile pipe cleaning apparatus
- mobile radio unit
- mobile radio-unit
- mobile station
- mobile task force
