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| Lightning
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A flash of light in the sky caused by the discharge of atmospheric electricity from one cloud to another or between one cloud and the earth. |
| Lightning arrestor
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Device which is connected to electrical equipment and also to the ground, to protect the equipment from lightning strikes and surges of high voltage by diverting it to the ground rather than the appliance. |
| Lightning rod
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Metal rod which is installed at the highest point on a structure so that lightning is diverted away from the structure, avoiding a hit and damage by lightning. |
| Lightweight concrete
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Concrete weighing only 90 to 110 pounds per cubic foot through use of lightweight aggregate, rather than weighing the 150 pounds per cubic foot of regular concrete. |
| Lightwood
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Term used for wood that is light in color such as pine, which is used for flooring, trim, paneling and furniture. |
| Lignite
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Coal, which is brown and incompletely formed, still having the texture of the original wood. |
| Lignum vitae
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Hard, dense wood from the two species of tropical American trees, Guaiacum. |
| Like-kind property
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Property that is similar in characteristics. Property that can be exchanged an a non-taxable transaction. |
| Limber
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Flexible, pliant. Able to be easily bent and shaped. |
| Limbing up
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Pruning off the lower limbs of trees, usually for ease of walking underneath or admitting sunlight. |
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