- medium plate
- megalithic
- megaseismic region
- melampyrit
- melanchyme
- melanin
- melanocerite
- melanovanadite
- melictose
- melting crucible
- melting loss
- melting tank
- membrane distillation
- membrane separation
- mend
- mendipite
- menerogenetic province
- menhaden oil
- menthannone
- menthenone
- menthnediamine
- menthyl
- mercaptides
- mercaptoacetic
- merchant copper
- merchantable oil
- mercuration
- mercurial
- mercuric oxide
- mercuric sulphide
- mercurous chloride
- mercury cup
- mercury cutoff
- mercury fulminate
- mercury ore
- mercury pump
- merge
- merocrystalline
- merrilite
- mersawa
- merwinite
- mesa
- mesh in
- mesh structure
- mesic atom
- measuring tank
- mechanical agitator
- mechanical brake
- mechanical cleaning
- mechanical drive
- mechanical haulage
- mechanical separation
- mechanical ventilation
- medicinal oil
- medium curing
- medium iron
- medium pressure
- medium relief
- medium sand
- medium steel
- medium wave
- megaseism
- megaseismic
- megaspore
- melanocratic
- melanophlogite
- melibiose
- mellate
- mellitic
- melt
- melt away
- melt out
- melted condition
- melting diagram
- melting process
- melting zone
- membrane filtration
- membrane potential
- mendozite
- meneralography
- menthene
- menthenol
- menthofuran
- mephitic
- meranti
- merawan
- mercaptan
- mercaptol
- mercaptomerin
- merchant bar
- mercurohrome
- mercury magnetometer
- mercury mine
- mercury pressure
- mercury tongs
- metadolomite
- metal detector
- metal fog
- metal meshes
- metalliferous mineral