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Arboriculture Glossary of Terms
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| Term | Definition |
|---|---|
| T.D.S. |
acronym used in the tying of knots that stands for tie, dress, and set.
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| tagline |
rope used to control the swing of a limb being removed or to control the direction or fall of a tree or limb being removed.
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| tannins |
organic substances produced by trees. Believed to be involved in a tree
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| tap root |
central, vertical root growing directly below the main stem or trunk that may or may not persist into plant maturity.
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| taper |
change in diameter over the length of trunks, branches, and roots.
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| target |
(1) person, object, or structure that could be harmed (damaged or injured) by a tree or tree part in the event of failure. (2) location of target pruning.
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| target (or natural) pruning |
process of branch removal to achieve a specified goal in which the pruning cuts are made at nodes and in relation to the positions of the branch collar and branch bark ridge.
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| target canker |
type of perennial canker that gains its name from the appearance caused by concentric rings, each of which represents a year
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| taut |
tightened to the point of eliminating visible slack.
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| tautline hitch |
type of friction hitch used by climbers for fall protection during ascent, descent, and work positioning.
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| taxonomic group |
any of several hierarchic levels in the classification of living organisms.
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| taxonomy |
science that studies the description, denomination, and classification of living organisms based on their similarities and differences. Contrast with anatomy, morphology, and physiology.
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| temporary branches |
in structural pruning of young trees, branches (generally the lower branches) that are left in place or subordinated but will be removed later in forming the permanent scaffold framework of a tree. Contrast with permanent branches.
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| tensile strength |
force at which a new piece of equipment or rope in testing fails in tension under a static load.
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| tensiometer |
instrument used to measure soil moisture.
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| tension |
in mechanics, the action of forces to stretch or pull apart any material or substance. Contrast with compression.
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| tension stress |
stretching force put on a tree limb. Can pose a potential hazard.
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| tension wood |
in broadleaved trees, reaction wood that forms on the upper side of branches or the trunks of leaning trees. Contrast with compression wood.
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| terminal bud |
bud at the tip of a twig or shoot. Apical bud. Contrast with lateral bud.
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| termination |
in cabling, a device or configuration that secures the end of a cable to the anchor hardware.
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