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ethynyl group

noun Chemistry.

the univalent group HC=C−, derived from acetylene.

Also called ethynyl radical.

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Ethynyl group is always a great word to know.

So is silicone. Does it mean:

pertaining to compounds that are not hydrocarbons or their derivatives

any of a number of polymers containing alternate silicon and oxygen atoms and that are fluid, resinous, rubbery, extremely stable in high temperatures, and water-repellent

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