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Term Definition
Areaway. A sunken space providing access, air, and light to a subterranean building area.  
Ark. A repository in a synagogue for the scrolls of the Torah.  
Armature. Part of an electric motor, generator, or other device moved by magnetism.  
Armor Plate. A kick-plate made of metal installed on the bottom of a door to protect it from denting and scratching.  
Armored Cable. Metal sheathed flexible electrical cable; BX cable.  
Armored Faceplate. A metal plate which is fastened into the strike at the door jamb to provide a protection for the lock and keeper mechanisms.  
Aromatic Hydrocarbons. Strong solvents such as benzene, toluene, xylene.  
Aromatic. Derived from or belonging to a major class of organic compounds, many of which are useful as solvents.  
Arrester, Lightning. A device connected to an electrical system to protect from lightning and/or voltage surges.  
Arris. The sharp edge or salient angle formed by the meeting of two surfaces, as in a molding.  
Art. Work exhibiting human creative skill or its application; creative activity; human skill or workmanship; an occupation requiring knowledge or skill.  
Arterial Streets. Primary surface roads connecting to expressways with on and off ramps, also connecting sectors of cities, with surface crossings (controlled by traffic lights), normally over continuous long stretches of the cityscape, restricted for parking and to direct access often to adjacent commercial developments; pedestrian crossing controlled.  
Artesian Well. 1.A bored well from which water flows from internal pressure. 2. A deep- bored well.  
Artificer. 1. A skilled or artistic craft worker. 2. An inventor.  
Artificial Intelligence. The ability of a computer to think and work like a human being; at present no computer has full artificial intelligence.  
Artificial or Accelerated Drying. The process of drying block or brick with relatively warm, dry air, or other means.  
Artificial Pozzolan. Fly ash and other similar substances such as rice hull ash and microsilica.  
Artisan. A skilled worker in a trade such as carpentry, plumbing, or painting.  
ASAHC. American Society of Architectural Hardware Consultants.  
Asbestine. Natural fibrous magnesium silica, which is pure white in color; used as an extender pigment in paints.  
Asbestos Abatement. Procres to control fiber release from asbestos-containing materials in a building or to remove it entirely; may involve removal, encapsulation, repair, enclosure, encasement, and operations and maintenance programs.  
Asbestos Cement. Cement asbestos.  
Asbestos Program Manager. A building owner or designated representative who supervises all aspects of the facility asbestos management and control program.  
Asbestos Removal. A special trade or occupation for the removal and disposal of hazardous asbestos.  
Asbestos Vacuum. A filtered device using air suction to collect wetted down asbestos for easy removal into specially made bags.  
Asbestos. A group of natural, fibrous, impure silicate materials, formerly used for its noncombustible, non-conducting, or chemically resistant properties; no longer used as it causes Asbestosis  
Asbestos-Containing Material (ACM). Any material containing more than one percent asbestos.  
Asbestos-Containing Material. Any material containing more than one percent asbestos.  
Asbestos-Free Compound. Joint treatment products that have no asbestos fiber.  
Asbestosis. A lung disease caused by inhaling asbestos particles.  

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