Tree terms: m
- m
- M
- M (apple rootstock)
- macadam
- macronutrient
- made ground
- MAGIC
- Magistrates court
- magnitude
- maiden (forestry)
- maiden (fruit tree)
- main
- main stem
- main-stem diameter
- main-stem volume
- Malthus
- mammals
- Management of Health and Safety at Work Regulations 1999
- manège
- manhole
- mansard roof
- maquis
- MArborA
- market garden
- marsh
- marsh saxifrage
- masonry
- mass extinction
- massaria disease of plane
- mast
- mast year
- material consideration
- matric water potential
- matrix fence
- matrix paving
- mattock
- maturity (tree parts)
- maturity (whole tree)
- maul
- mead
- meadow
- mean annual increment
- mechanical stress
- mechanics
- medieval
- medieval gardens
- medieval warm period
- medullary ray
- mega-
- membrane
- Men of the Trees
- mens rea
- meridional overturning circulation
- meristem
- mesh-protected turf
- mesic
- metabolism
- metabolite
- metalled
- methane
- methane clathrate
- method statement
- metre
- metric system
- Metriguard
- MEWI
- MEWP
- MH
- microclimate
- microfibril
- micro-injection
- micronutrient
- microsite
- microspecies
- microtunnelling
- middle lamella
- midge
- Milankovitch cycles
- mildew
- millennium green
- Millennium seed bank
- millennium yew
- milli-
- minarette
- mire
- Miscanthus (M. ×giganteus)
- mist
- mistletoe
- mite
- mitigate
- mitigation banking (ecosystem banking)
- MM
- mobile elevating work platform
- modern and post-modern gardens
- modified Lorette system
- modified plasticity index
- modulus of elasticity
- Mohr-Coulomb’s law
- moisture content
- mole drain
- moling
- moment
- Monocotyledoneae
- monoecious
- monolith
- moor
- mor
- moribund
- mortar
- mortice
- mosses
- moths
- mounding
- mountain
- mountain pine beetle (Dendroctonus ponderosae)
- mouse-ear
- movement joint
- mowing strip
- mulch
- mull
- Multi-agency geographic information for the countryside (MAGIC)
- multi-size pavers
- multi-stem
- muntjac deer (Muntiacus reevesi)
- mushroom
- mycelium
- mycorrhiza