ionone

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i·o·none

(ī'ō-nōn),
One of two cyclic terpene ketones with an odor of violets or cedar wood, the α and β varieties of which differ in the location of the double bond in the ring: provitamins A and vitamin A have ionone configuration in the ring portion; α-carotene contains one α- and one β-ionone moieties, β-carotene contains two β-ionone moieties, and γ-carotene contains one β-ionone moiety.
Farlex Partner Medical Dictionary © Farlex 2012

io·none

(ī'ō-nōn)
One of two cyclic terpene ketones with an odor of violets or cedar wood.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
The availability of irones and ionones in the raw material determines the characteristic smell of violets of iris and their mucolytic action.
General topic areas include: historical aspects, structure-odor relationships, odorants from natural and petrochemical sources, essential oils, odorants of animal origin and ionones, damascones, and Iso E Super.
EAT TOMATOES FOR FRESH BREATH Tomatoes contain ionones, which are believed to neutralise the odour-causing sulphur compounds in the mouth, so eating two or three tomatoes a day may help prevent bad breath, or halitosis.