ionone
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i·o·none
(ī′ə-nōn′)n.
A colorless to yellowish liquid ketone, C13H20O, having the odor of cedar or violets, occurring in either of two isomeric forms, and used chiefly in perfumes.
[Originally a trademark.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ionone
(ˈaɪəˌnəʊn)n
1. (Elements & Compounds) a yellowish liquid mixture of two isomers with an odour of violets, extracted from certain plants and used in perfumery
2. (Elements & Compounds) either of these two isomers. Formula: C13H20O
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014