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limonene

[lim-uh-neen] /ˈlɪm əˌnin/
noun, Chemistry
1.
a liquid terpene, C 40 H 16 , occurring in two optically different forms, the dextrorotatory form being present in the essential oils of lemon, orange, etc., and the levorotatory form in Douglas fir needle oil.
Origin of limonene
1835-1845
1835-45; < New Latin Limon(um) lemon + -ene
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Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for limo nene

limonene

/ˈlɪməˌniːn/
noun
1.
a liquid optically active terpene with a lemon-like odour, found in lemon, orange, peppermint, and other essential oils and used as a wetting agent and in the manufacture of resins. Formula: C10H16
Word Origin
C19: from New Latin limonum lemon
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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