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ionone

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WordReference Random House Unabridged Dictionary of American English © 2026

i•o•none n. [Chem.]

Chemistrya light-yellow to colorless, slightly water-soluble liquid that is either one or a mixture of two unsaturated ketones having the formula C₁₃H₂₀O, used chiefly in perfumery.

formerly trademark 1890–95

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