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[pahy-neen] /ˈpaɪ nin/

noun, Chemistry.
a liquid terpene, C 1 0 H 1 6 , the principal constituent of oil of turpentine, found in other essential oils: used chiefly in the manufacture of camphor.
either of two isomeric terpenes, found in many essential oils and constituting the main part of oil of turpentine. The commonest structural isomer (α-pinene) is used in the manufacture of camphor, solvents, plastics, and insecticides. Formula: C10H16


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