Terpene n. (Chem.) Any one of a series of isomeric hydrocarbons of pleasant aromatic odor, occurring especially in coniferous plants and represented by oil of turpentine, but including also certain hydrocarbons found in some essential oils.
... pleasant-odored terpene ketone, C10H16O, obtained from the camphor tree. Used in medicine as a counter-irritant for infections and to treat pain ... — The Veterinarian • Chas. J. Korinek
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