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Arboriculture Glossary of Terms
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| Term | Definition |
|---|---|
| cable aid |
device used to tighten lags and aid in cable installation.
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| cable anchor |
hardware to which a cable termination is affixed in a cabling or guying installation.
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| cable clamp |
double-bolted, U-shaped clamp, sometimes used to secure tree cables. Not acceptable or approved for tree support systems in the United States.
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| cable grip |
mechanical device that grasps and holds the cable during installation.
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| cabling |
installation of steel or synthetic cable in a tree to provide supplemental support to weak branches or crotches.
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| callus |
undifferentiated tissue formed by the cambium, usually as the result of wounding. Contrast with woundwood.
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| cambium |
thin layer(s) of meristematic cells that give rise (outward) to the phloem and (inward) to the xylem, increasing stem and root diameter.
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| canker |
localized diseased area on stems, roots, and branches. Often shrunken and discolored.
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| canopy |
collective branches and foliage of a tree or group of trees
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| cant hook |
lever with an adjustable hook and having a blunt end instead of a spike. Used for handling and rolling logs. Traditionally made with a stout wooden lever but now often made of metal. Contrast with peavey.
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| carabiner (karabiner) |
connecting device. Oblong metal ring used in climbing and static rigging that is opened and closed by a spring-loaded gate. Contrast with snap.
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| carbohydrate |
compound, combining carbon, hydrogen, and oxygen, that is produced by plants as a result of photosynthesis. Sugars and starches.
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| cardiopulmonary resuscitation (CPR) |
procedure used by a trained person to force air into the lungs and to force blood circulation in a person whose heart has stopped beating. See also artificial respiration.
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| carotenoid |
yellow, orange, or red pigment responsible for those colors in some parts of trees and other plants. Compare to anthocyanin and xanthophyll.
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| cation |
positively charged ion. In soils, the most abundant cations are calcium (Ca), magnesium (Mg), potassium (K), sodium (Na), and aluminum (Al). Contrast with anion.
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| cation exchange capacity (CEC) |
ability of a soil to adsorb and hold cations. Affected by soil pH. Measures soil fertility, clay composition, and engineering characteristics.
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| causal agent |
biotic or abiotic agent that induces a disease or disorder.
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| cavity |
open or closed hollow within a tree stem, usually associated with decay.
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| cell |
basic structural and functional unit of living organisms.
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| cellulose |
complex carbohydrate found in the cellular walls of the majority of plants, algae, and certain fungi.
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