- metallized
- metamorphic schist
- meteorological station
- meter
- meter flume
- metering device
- methylic ether
- metope
- metronome
- metropolitan area
- micaceous
- microcalculate
- microcrack
- microfilm duplicator
- microfilter
- microhardness
- middle course
- midspan deflection
- midspan reinforcement
- mile post
- milepost
- military
- military load
- milk glass
- mill
- mill rolls
- mill throat
- milled
- milling excavator
- milling machine
- million
- mine field
- mine road
- mine transport
- mineral tar
- mini
- minimum
- minimum load
- mining engineer
- mining region
- mining shovel
- mining survey
- minority
- minstrel
- mircoprocessing
- mirror finish
- mirror square
- miscellaneous load
- miscellaneous pitch
- misfired charge
- mission
- miter gear
- mitre gear
- mitre square
- mix hardening
- mixed reflexion
- mixer trestle
- mixing box
- mixing cycle
- mixing drum
- mixing paddle
- mixing platform
- mixing point
- mixing screw
- mixing section
- mixing speed
- mixing tower
- mixing valves
- mixture turbine
- mixture viscosity
- moat
- mobile angle
- mobile architecture
- mobile building
- mobile compressor
- mobile crane
- mobile formwork
- mobile gate
- mobile hoist
- mobile obstacle
- mobile restaurant
- mobile scaffolds
- mobile structure
- mobility
- mobilize
- mock purlin
- mode analysis
- mode testing
- model adequacy
- model code
- model dwelling
- model file
- model pile
- model strip
- model testing
- modeling
- modeller
- modelling
- modelling program
- moderate