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WordReference Random House Learner's Dictionary of American English © 2024sil•i•cone /ˈsɪlɪˌkoʊn/USA pronunciation n. [uncountable]- Chemistryan artificial polymer made from silicon and oxygen and used in making water-repellent substances such as adhesives, lubricants, and oils.
WordReference Random House Unabridged Dictionary of American English © 2024sil•i•cone (sil′i kōn′),USA pronunciation n. [Chem.]- Chemistryany 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.
Collins Concise English Dictionary © HarperCollins Publishers:: silicone /ˈsɪlɪˌkəʊn/ n - any of a large class of polymeric synthetic materials that usually have resistance to temperature, water, and chemicals, and good insulating and lubricating properties, making them suitable for wide use as oils, water-repellents, resins, etc. Chemically they have alternate silicon and oxygen atoms with the silicon atoms bound to organic groups
- (as modifier): silicone rubber
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