limonene

[ lim-uh-neen ]
/ ˈlɪm əˌnin /
|

noun Chemistry.

a liquid terpene, C40H16, 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

1835–45; < New Latin Limon(um) lemon + -ene
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for limonene

limonene

/ (ˈlɪməˌniːn) /

noun

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: C 10 H 16

Word Origin for limonene

C19: from New Latin limonum lemon
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