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| Abutment piece
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The bottom plate of a wall. |
| Abutting
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Property adjoining or bordering another property. |
| Ac motors
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AC motors operate only on alternating, or house, current. |
| Acanthus
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Architectural ornament in the shape of the acanthus leaf. |
| Accelerated cost recovery system
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A tax calculation to provide greater depreciation during early years of ownership of property or real estate, mandated by the Tax Reform Act of 1986. |
| Accelerated depreciation
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Bookkeeping methods to depreciate property more quickly in the early years of ownership. |
| Acceleration clause
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A provision in some loans, which gives the lender the right to collect the full balance of that loan, if the borrower misses a payment. |
| Acceleration loss
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Energy used in an air-moving system to accelerate the air to the required velocity. |
| Accelerator
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Substance that shortens the setting times of concrete and mortar. Accelerators, or accelerants, are added in cold weather when there is a danger of the concrete or mortar freezing before it can cure properly. Accelerators are considered admixtures. Chemical substance added to a mixture to speed up a reaction. |
| Accelerators
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Materials used to speed up the setting of mortar. |
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