- metaheulandite
- metal film
- metal oxide
- metal power
- metal protection
- metaldehyde
- metalized screen
- metallic lustre
- metallic packing
- metallic soap
- metallic state
- metallic vein
- metallized background
- metallogenetic
- metallygical oil
- metamorphic aureole
- metaphosphate
- metasktable state
- meter reading
- methallyl
- methane
- methanoic
- methionic
- methyl
- methyl alcohol
- methyl spirit
- methylaminophenol sulfate
- methylate alcohol
- methylbutane
- methylene
- methylenedioxybenzaldehyde
- methylisopropylphenanthrene
- methylpropancol
- metric system
- microbreccia
- microcaliper log
- microcrystalline structure
- microgranitic
- microlite
- micrometric
- micronized
- microscopic analysis
- microsection
- microtetonic
- middle distillate
- miller indices
- milling ore
- mine haulage
- mine surveying
- mineral fat
- mineral graphite
- mineral oil
- mineral pigment
- mineral spot
- mineral theory
- mineral zone
- mineralize
- mineralizing agent
- minette
- minimum pendulum
- minimum reflux
- mining district
- mining field
- mining method
- mining regulation
- mining working
- minor intrusion
- minor sea
- misfiring
- mixed
- mixed crystal
- mixed indicator
- microwave region
- middle roll
- middletonite
- miersite
- migmatite
- mildew
- milestone
- milkiness
- milky ice
- millisite
- mimetic crystal
- mine face
- mine igniter
- mine timber
- mineragraphy
- mineral burning
- mineral charcoal
- mineral deposit
- mineral rubber
- mineral spirit
- mineral wax
- mineralizer
- mining area
- mining company
- mining engineering
- miniphyric structure
- mint oil
- miocene