Definition of fenchone
: an oily terpenoid ketone C10H16O that is isomeric with camphor and has a camphoraceous odor, that exists in three optically different forms, occurring as the dextrorotatory form especially in fennel oil and as the levorotatory form in thuja oil, and that is used chiefly as a pine scent; 1,3,3-trimethyl-2-keto-norbornane
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Origin and Etymology of fenchone
German fenchon, from fenchel fennel + -on -one
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