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Arboriculture Glossary of Terms
There are 1070 entries in this glossary.
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| Term | Definition |
|---|---|
| anvil-type pruning tool |
hand pruning tool with a sharp, straight blade that cuts against a flat metal surface. Cuts across fibers and may crush adjacent fibers. Intended for cutting single, small-diameter stems. Also called hand pruners or hand snips.
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| apical |
having to do with the tip of a leaf or stem.
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| apical bud |
see terminal bud.
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| apical control |
inhibition of lateral buds, decreasing from the top down, by apical buds over many seasons, resulting in trees with an excurrent growth form.
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| apical dominance |
condition in which the terminal bud inhibits the growth and development of the lateral buds on the same stem formed during the same season.
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| apical meristems |
growing points at the tips of shoots and roots.
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| apoplasm |
free spaces in plant tissue. Includes cell walls and intracellular spaces. Contrast with symplasm.
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| appraisal |
(1) placing a monetary value on a tree, other plant, other landscaping, including hardscape, or an entire property. (2) a report stating an opinion of appraised value. (3) particularly outside the United States, an evaluation of nonmonetary landscape or plant characteristics.
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| approach distances |
minimum distances that must be maintained between conductors and other energized equipment and qualified line-clearance personnel or persons other than line-clearance personnel and their bodies or tools. Approach distances vary with qualifications of personnel and with voltages.
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| appropriate response process (ARP) |
method of systematically assessing plant health and client needs to determine which course of action, if any, is recommended.
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| approved |
in the context of guidelines, standards, and specifications, that which is acceptable to federal, state, provincial, or local enforcement authorities or is an accepted industry practice.
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| arboriculture |
practice and study of the care of trees and other woody plants in the landscape.
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| arborist |
professional who possesses the technical competence gained through experience and related training to provide for or supervise the management of trees and other woody plants in residential, commercial, and public landscapes.
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| arborist block |
heavy-duty pulley with an integrated connection point (bushing for attaching a rope sling), a rotating sheave for the rope, and extended cheek plates. Used in tree rigging operations.
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| artificial respiration |
forcing air into the lungs of a person who has stopped breathing. See also cardiopulmonary resuscitation (CPR).
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| AS 4373-1996, Pruning of Amenity Trees |
in Australia, industry-developed, national consensus standards of practice for pruning.
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| ascender |
piece of gear that enables a climber to ascend a rope. Attached to the rope, it will grip in one direction (down) and slide in the other (up). Contrast with descender.
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| asymptomatic |
without symptoms.
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| auger |
tool that bores holes in wood or other materials while carrying cuttings away from the bored hole. Fitted with a cross handle for hand use.
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| auger bit |
tool that bores holes in wood or other materials while carrying cuttings away from the bored hole. Fitted with a hex, round square, or threaded shank for insertion into a power drill or driver.
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