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From silicon + -one. Originally obtained by the attempted synthesis of the silicon equivalent of a ketone.
Etymology from Wiktionary, CC BY-SA 4.0.
silicone
Today it means: Any of a class of inert, semi-inorganic polymeric compounds (polysiloxanes), that have a wide range of thermal stability and extreme water repellence, used in a very wide range of industrial applications, and in prosthetic replacements for body parts. Full definition →