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Term Definition
Decoupling. Separating elements to retard the transmission of structural-borne sound, thermal conductance, or physical loads.  
Dedication. The appropriation of land or easements by a private owner for public purposes or use.  
Dctive Alternate. An alternate bid that, if accepted, rces the contract price.  
Deed of Trust. See Trust Deed.  
Deed Restrictions. Restrictive covenants often included in a deed which may limit future uses of the land, and other restrictions such as height, size, and aesthetics, as long as they are not against the public interest.  
Deeds. A general term which refers to all documents conveying property, from one person to another.  
Deep Color. Intense or strong color with no apparent presence of black.  
Deep Seal-P Trap. A P-trap with a water seal depth of more than 4 inches.  
Default. A material failure to perform the requirements of a contract.  
Defect. An imperfection.  
Defendant. A party against whom a legal claim is made in a civil law suit.  
Deferred Maintenance. Repair and upkeep that has been neglected or postponed.  
Deficit. An economic shortfall, where expenses exceed income; a debit balance in the retained earnings account.  
Deflection. 1. A variation in position or shape of a structure or structural element due to effects of loads or volume change, usually measured as a linear deviation from an established plane rather than an angular variation. 2. Displacement or bending of a structural member due to application of external force.  
Deformation, Eutectic. See Eutectic Deformation.  
Deformation. The change in shape of a body brought about by the application of a force. Deformation is proportional to the force within the elastic limits of the material.  
Deformed Bar. A steel reinforcing bar manufactured with deformations (bumps, lugs, or ridges) to provide a locking anchorage with the surrounding concrete.  
Deformed Reinforcement. Deformed reinforcing bars, bar and rod mats, and deformed wire fabric.  
Defrost Device. Refrigerating cycle in which evaporator frost and ice accumulation is melted.  
Defrost Timer. Device connected into electrical circuit which shuts unit off long enough to permit ice and frost accumulation on evaporator to melt.  
Defrosting Control. Device to automatically defrost evaporator; it may operate by means of a clock, door cycling mechanism, or during off portion of refrigerating cycle.  
Defrosting Type Evaporator. Evaporator operating at such temperatures that ice and frost on surface melts during off part of operating cycle.  
Defrosting. Process of removing frost accumulation from evaporators.  
Degradation. A decline in quality; degeneration.  
Degreaser. Chemical solution for grease removal.  
Degreasing. Solution or solvent used to remove oil or grease from refrigerator parts.  
Degree Day Method. A method of computing fuel requirements for HVAC systems, see Degree Day.  
Degree Day. Unit that represents one degree of difference from inside temperature and the average outdoor temperature for one day and is often used in estimating fuel requirements for a building.  
Degree of Saturation. The amount of water present in the air relative to the maximum amount it can hold at a given temperature without causing condensation.  
Degree. 1. A unit on one of the temperature scales. 2. A unit of measurement of angles, equal to 60 minutes; a right angle is 90 degrees.  

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