- mixture contamination
- mobile charge
- metallic line
- metallized paper
- metastability
- metastable state
- meter
- meter bridge
- methane freon
- methyl bromide
- methylene chloride
- metronome
- MHD generator
- microbiological change
- microcanonical ensemble
- microsystem
- microwave circuit
- microwave ferrite
- microwave holography
- microwave interferogram
- microwave method
- microwave refractometer
- microwave spectrum
- milking generator
- millifarad
- millimeter
- millirad
- milliwatt
- mineral wool
- miniature
- mirror optics
- miscibility gap
- miscount
- mist eliminator
- mixed state
- mixing box
- mixture composition
- mixture regulator
- MKSA units
- mobile refrigeration
- Mobius resistor
- mode filter
- model measure
- moderate temperature
- moderating medium
- modular condenser
- modulated
- modulated signal
- modulated wave
- modulation depth
- modulation meter
- modulation noise
- modulation rate
- modulator
- moist gas
- moisture absorber
- moisture absorption
- moisture absorptivity
- moisture accumulation
- moisture adsorption
- moisture barrier
- moisture capacity
- moisture condensation
- moisture difference
- moisture diffusion
- moisture distribution
- moisture equilibrium
- moisture exchange
- moisture gradient
- moisture indicator
- moisture infiltration
- moisture level
- moisture limit
- moisture losses
- moisture migration
- moisture movement
- moisture particle
- moisture precipitation
- moisture proofing
- moisture resistance
- moisture separator
- moisture tons
- moisture-free
- moistureproof container
- moistureproof packaging
- molar mass
- molar solution
- molded capacitor
- Mollerhoj cable
- moment alloy
- momentum change
- monoblock compressor
- monoisotopic
- monomeric
- monomode fibre
- mononuclear
- monostable relay
- molecular distillations
- molecular model
- molecularity