insulating compound
71Aerated autoclaved concrete — Autoclaved Aerated concrete (AAC), or otherwise known as Autoclave Cellular Concrete (ACC), is a lightweight, precast building material. AAC provides structure, insulation, fire and mold resistance in a single material. AAC products include… …
72Silicon nitride — Preferred IUPAC name Silicon nitride …
73History of electromagnetism — The history of electromagnetism, that is the human understanding and recorded use of electromagnetic forces, dates back over two thousand years ago, see Timeline of electromagnetism. The ancients must have been acquainted with the effects of… …
74crystal — crystallike, adj. /kris tl/, n., adj., v., crystaled, crystaling or (esp. Brit.) crystalled, crystalling. n. 1. a clear, transparent mineral or glass resembling ice. 2. the transparent form of crystallized quartz. 3. Chem., Mineral. a solid body… …
75Crystal — /kris tl/, n. 1. a city in SE Minnesota, near Minneapolis. 25,543. 2. a female given name. * * * I Any solid material whose atoms are arranged in a definite pattern and whose surface regularity reflects its internal symmetry. Each of a crystal s… …
76petrochemical — /pe troh kem i keuhl/, n. 1. a chemical substance obtained from petroleum or natural gas, as gasoline, kerosene, or petrolatum. adj. 2. of or pertaining to petrochemistry or a petrochemical. [1910 15; PETRO 2 + CHEMICAL] * * * Strictly, any of a… …
77silicone — /sil i kohn /, n. Chem. any of a number of polymers containing alternate silicon and oxygen atoms, as ( Si O Si O )n, whose properties are determined by the organic groups attached to the silicon atoms, and that are fluid, resinous, rubbery,… …
78steel — steellike, adj. /steel/, n. 1. any of various modified forms of iron, artificially produced, having a carbon content less than that of pig iron and more than that of wrought iron, and having qualities of hardness, elasticity, and strength varying …
79wax — wax1 waxable, adj. waxlike, adj. /waks/, n. 1. Also called beeswax. a solid, yellowish, nonglycerine substance allied to fats and oils, secreted by bees, plastic when warm and melting at about 145°F, variously employed in making candles, models,… …
80industrial glass — Introduction solid material that is normally lustrous and transparent in appearance and that shows great durability under exposure to the natural elements. These three properties lustre, transparency, and durability make glass a favoured… …
