silicone - any of a large class of siloxanes that are unusually stable over a wide range of temperatures; used in lubricants and adhesives and coatings and synthetic rubber and electrical insulationatomic number 14, silicon, Si - a tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors bouncing putty - a soft elastic silicone polymer that increases in elasticity with the application of force; used in the center of golf balls and as shock-absorbent padding polymer - a naturally occurring or synthetic compound consisting of large molecules made up of a linked series of repeated simple monomers siloxane - any of a large class of compounds that have alternate silicon and oxygen atoms |