any of a large group of synthetic organosilicon polymers (siloxanes) based on chains or networks of alternating silicon and oxygen atoms, many of these being good electrical insulators with high durability, and finding uses as liquids, greases, rubbers (notably in cosmetic surgery), or resins, räniorgaaniline polümeer, mida kasutatakse lakkide, värvide, isoleermaterjalide jms. valmistamiseks ning teat. plastmasside sideainena