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pinene

[pahy-neen] /ˈpaɪ nin/
noun, Chemistry.
1.
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.
Origin of pinene
1880-1885
First recorded in 1880-85; pine1 + -ene
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Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for pinene

pinene

/ˈpaɪniːn/
noun
1.
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
Word Origin
C20: from pine1 + -ene
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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