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Arboriculture Glossary of Terms
There are 1070 entries in this glossary.
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| Term | Definition |
|---|---|
| Machard |
type of friction hitch used in climbing and rigging.
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| Machard tresse (Mt) |
type of friction hitch used in climbing and rigging.
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| machine-threaded |
cable anchor or bracing rod with a fine-thread pattern that is used with a nut and washer and installed through a pre-drilled hole that is larger in diameter than the rod. Contrast with lag-threaded.
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| macroinfusion |
technique to introduce substances directly into the xylem of a tree to treat or prevent diseases, disorders, or pest problems through a relatively large-diameter hole in the trunk or a cut root. Contrast with implant, macroinjection, and microinjection.
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| macroinjection |
trunk injection technique that requires a relatively large-diameter hole in the trunk. Contrast with implant, macroinfusion, and microinjection.
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| macronutrient |
essential element that is required by plants in relatively large quantities. Contrast with micronutrient.
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| macropore |
relatively large space between soil particles that is usually air filled and allows for water movement and root penetration. Contrast with micropore.
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| main conductor |
primary conductor cable of a tree lightning protection system. Standard down conductor.
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| marline hitch |
(1) simple hitch used in lashing. (2) in rigging, a secondary knot used in combination with a primary attachment knot to tie off sections for lowering.
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| marline spike |
tool that tapers to a point. Used for separating the strands of a rope in splicing and in marling.
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| marling |
act of forming marline hitches in series along an object.
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| mass grading |
process of reshaping the landscape to specified elevations for the construction of buildings and/or to provide drainage. See grading.
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| mature height |
maximum height that a plant is likely to reach if the conditions of the planting site are favorable.
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| mechanical advantage |
system by which effort or force can be multiplied.
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| mechanics |
study of forces and their effects on bodies at rest or in motion.
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| meristem |
undifferentiated tissue in which active cell division takes place. Found in the root tips, buds, cambium, cork cambium, and latent buds.
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| mesophyll |
middle layers of a leaf where most photosynthesis takes place. Composed primarily of palisade and spongy parenchyma cells.
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| microbial extracts |
substances derived from microorganisms. May be used to control certain pests.
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| microinjection |
trunk injection technique using a small-diameter trunk penetration to introduce chemicals directly into the xylem. Contrast with implant, macroinfusion, and macroinjection.
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| micronutrient |
essential element that is required by plants in relatively small quantities. Contrast with macronutrient.
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