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Arboriculture Glossary of Terms
There are 1070 entries in this glossary.
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| Term | Definition |
|---|---|
| washer |
heavy-duty steel hardware installed on through-hardware between the tree surface and the nut.
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| water knot |
variation of the overhand knot. Used in joining the two ends of a length of webbing to create a loop sling. See beer knot.
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| water table |
upper level of groundwater in the soil.
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| water-holding capacity |
ability of a soil to hold moisture.
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| water-insoluble nitrogen (WIN) |
nitrogen fertilizer in a form that is not readily soluble in water.
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| watersprout |
upright, epicormic shoot arising from the trunk or branches of a plant above the root graft or soil line. Incorrectly called a sucker. Contrast with sucker.
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| watt (W) |
standard unit of measurement of electrical power. Rate of work done per unit of time (joules per second). Electrical power (P) is expressed as voltage (V) multiplied by current (I):P = V?? I.
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| webbing |
sturdy fabric woven in narrow widths for use where strength is required.
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| webbing sling (web sling) |
length of sewn webbing, often formed into a loop, used as an attachment in rigging.
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| weight |
force created by the action of the earth (gravity) on an object.
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| white rot |
fungal decay of wood in which both cellulose and lignin are broken down. Contrast with brown rot and soft rot.
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| whoopie sling |
sling with one fixed eye and one adjustable eye, made from hollow-braid rope.
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| whorled |
leaves, twigs, or branches arranged in a circle around a point on the stem. Contrast with alternate and opposite.
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| wilt |
(1) (noun) loss of turgor and subsequent drooping of leaves and young stems; a symptom. (2) (noun) infectious disease caused by a particular agent on a particular host or range of hosts. (3) (verb) to lose turgor or to wilt.
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| wilting point |
see permanent wilting point.
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| WIN |
see water-insoluble nitrogen.
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| windthrow |
tree failure due to uprooting caused by wind.
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| winter kill |
injury from cold winter temperatures.
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| wire basket |
type of metal basket used to support the root ball of a balled-and-burlapped tree or a tree dug with a tree spade.
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| wire strop |
flip line with a steel core.
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