In the meter-kilogram-second system, the unit of force required to accelerate a mass of one kilogram one meter per second per second (sİ÷.).
Niche
(1) Small recessed area or hollow in a wall, which is traditionally used for a statue or vase, etc. (2) A specialized market, industry, or profession. n
Niche
A recess in a wall (interior or exterior), especially for a statue. Usually curved at the back.
Niello
A black alloy used as a decorative inlay in metal surfaces. Made from silver, lead, copper, and sulfur.
Night seal
A temporary sheet covering of synthetic, waterproof material used to cover an opening in a roof until construction is complete.
Nineteen-inch selvage
Also referred to as wide selvage asphalt or SIS, this asphalt roofing has a 17 inch granulated surface and 19 inch non-granulated.
Ninety-pound
Granule-surfaced or fiber glass or organic felt roll roofing that has a mass of approximately 90 pounds per 100 square feet.
Nippers
Wire cutters.
Nipple
A short length of pipe installed between couplings or other fittings.
