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Arboriculture Glossary of Terms
There are 1070 entries in this glossary.
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| Term | Definition |
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| back cut |
cut made on a tree trunk or branch, opposite from and toward the notch, face cut, or undercut, to complete felling or branch removal. Contrast with bore cut.
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| back feed |
process whereby electricity is fed back into downed lines, usually from a home generator that can re-energize the lines. Voltage can be modified if it passes through a transformer.
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| backfill |
(1) soil or amended soil used to fill the hole when planting a tree. (2) soil, common fill, aggregates, or contaminants in various combinations put back into an excavation. May not be hospitable for tree root growth and function.
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| bacteria |
single-celled organisms having a cell wall but no organized nucleus. A few species are plant pathogens.
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| balance |
in rigging, a technique for lowering a limb without allowing either end to drop.
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| balancer |
rigging sling(s), usually with at least one spliced eye and a Prusik to position the load line. Used to rig a limb in a balanced configuration.
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| balled and burlapped (B&B) |
tree or other plant dug and removed from the ground for re-planting, with the roots and soil wrapped in burlap or a burlaplike fabric. Contrast with bare root, container grown, containerized, and in-ground fabric-bag grown.
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| barber chair |
dangerous condition created when a tree or branch splits upward vertically from the back cut, slab up.
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| bare root |
tree or other plant removed from the ground for re-planting without soil around the roots. Contrast with balled and burlapped, container grown, containerized, and in-ground fabric-bag grown.
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| bark |
protective outer covering of branches and stems that arises from the cork cambium or cambium.
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| bark tracing |
cutting away torn or injured bark to leave a smooth edge.
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| barrier |
see root barrier and tree protection zone barrier.
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| barrier zone |
chemically defended tissue formed by the still-living cambium, after a tree is wounded or invaded by pathogens, to inhibit the spread of decay into new annual growth rings. Wall 4 in the CODIT model. Contrast with reaction zone.
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| basal bark application |
application of herbicides, usually mixed with penetrating oil, to the lowest 12 to 18 inches (30 to 45 centimeters) of the main stem(s) of unwanted vegetation.
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| bearing |
device, often relying on balls or rollers, to reduce friction between mechanical parts such as a wheel or a pulley sheave and an axle or a shaft and case connecting rod. Contrast with bushing.
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| becket |
an auxiliary attachment point on a block or pulley, usually 180 degrees from the main attachment, that is used to reeve the rigging line in a set of blocks.
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| beer knot |
knot commonly used to join two ends of a piece of tubular webbing to create a loop. See water knot.
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| belay |
means of securing or slowing a climbing line by using wraps around a cleat, carabiner, or other device.
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| belay device |
piece of equipment used to provide friction for belaying a climber.
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| bend |
type of knot used to join two rope ends together. Contrast with hitch.
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