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Arboriculture Glossary of Terms
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| Term | Definition |
|---|---|
| DRT |
acronym for double rope technique. Climbing system in which two separate ropes and two separate anchor points are utilized. Contrast with DdRT and SRT.
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| drum lace |
method of tying the root ball of a balled-and-burlapped tree for moving.
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| dynamic load |
forces created by a moving load. Load that changes with time and motion. Contrast with static load.
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| dynamics |
study of how objects move under the action of forces.
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| dynamometer |
instrument for measuring mechanical force or power.
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| earlywood |
portion of an annual ring formed during the spring, characterized by large cells and thin walls, often lighter in color. Also called springwood. Contrast with latewood.
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| earth auger |
drill bit with a wide, threaded shank used for drilling holes in the ground. See soil auger.
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| easement |
legal interest in real property that conveys use or partial use, but not ownership, of a portion of an owner
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| ecosystem |
complex system of living organisms and their abiotic environment.
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| ectomycorrhizae |
type of mycorrhizae that grow between the cortical or epidermal cells of absorbing roots, forming an outer sheath around the root. See mycorrhizae. Contrast with endomycorrhizae.
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| edema (oedema, in British English) |
watery swelling in plant tissue.
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| EHS cable |
see extra-high-strength cable.
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| elastic energy |
potential energy stored in an elastic material due to stretching or compression, such as a spring or rubber band.
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| electric supply lines |
conductors used to transmit electric energy and their necessary supporting or containing structures.
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| electric utility |
corporation, person, agency, authority, or other legal entity or instrumentality aligned with distribution facilities for delivery of electric energy for use primarily by the public.
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| electrical conductor |
any object, material, or medium through which an electrical current can flow. Electric supply lines are designed as electrical conductors; however, guy wires, communication cables, tools, equipment, vehicles, humans, animals, and other items can function as electrical conductors.
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| electrical current |
amount of electricity passing through an electrical conductor. Measured in amps.
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| electrical potential |
difference in electric charge between an energized conductor and the ground or other object. Measured in volts.
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| electrical resistance |
relative opposition of an object, material, or medium to the flow of electrical current. Measured in ohms. Material such as copper has low resistance and is therefore a good conductor; material such as glass has high resistance and is therefore a good insulator.
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| electrical short |
unintended redirection of electrical current to ground, interrupting the flow of electricity. If the path of an electrical short runs through a person, severe injury or death may result.
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