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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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| Vald |
variation of the French Prusik. Used as a friction hitch in climbing and rigging.
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| variety |
naturally occurring subdivision of a species having a distinct difference and breeding true to that difference. Compare to cultivar.
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| vascular discoloration |
darkening of the vascular tissues of woody plants in response to disease.
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| vascular tissue |
tissue that conducts water or nutrients.
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| vector |
(1) in pathology, biotic or abiotic agent that transmits a pathogen. (2) in mechanics or rigging, quantity that has both a magnitude and a direction (e.g., force); see acceleration and velocity.
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| vegetation management |
management and control of vegetation to achieve established goals and objectives. See Integrated Vegetation Management.
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| velocity |
simply, speed. Rate at which an object
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| venation |
arrangement of veins in a leaf.
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| vertical mulching |
an aeration or fertilization technique. Drilling vertical holes in the soil and filling them with materials to improve aeration.
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| vessels |
end-to-end, tubelike, water-conducting cells in the xylem of angiosperms.
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| vigor (vigour, in British English) |
overall health. Capacity to grow and resist stress. Sometimes limited in reference to genetic capacity.
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| virus |
ultramicroscopic, infectious agent (piece of nucleic acid) that can reproduce only in living cells of other organisms. Can cause disease.
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| vista pruning |
selective pruning to enable a view from a predetermined point.
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| vitality |
overall health. Ability of a plant to deal effectively with stress.
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| volt (V) |
Measure of electric potential or electromotive force. A potential of one volt appears across a resistance of one ohm when a current of one ampere flows through that resistance.
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| voltage |
difference in electrical potential between any two conductors or between a conductor and ground. It is a measure of the electric energy per electron that electrons can acquire and/or give up as they move between the two conductors.
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| voltage regulator |
(1) pertaining to electric utilities, device used to maintain the voltage within the electrical conductors at a constant level and within the defined tolerances. (2) device in the electrical system of a vehicle or equipment engine.
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