irone \i"rone\, irones \i"rones\, n.
A fragrant liquid substance, a mixture of several isomers of
the formula {C14H22O}, forming the essence of the violet
fragrance, commonly isolated from orris oil or from the
rhizomes of Iris. The main ingredient in violets is
{[alpha]-irone}, which occurs as both cis and trans
stereoisomers. Called also {6-methylionone}.
[PJC]