/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, extremely stable in high temperatures, and water-repellent: used as adhesives, lubricants, and hydraulic oils and in electrical insulation, cosmetics, etc.
[ 1905-10; SILIC(ON) + -ONE ]