fenchone

noun

fen·​chone

-ˌchōn

plural -s

: 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

Word History

Etymology

German fenchon, from fenchel fennel + -on -one

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