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Orrisroot

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orrisroot

[′ȯr·əs‚rüt]
(materials)
orris
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Orrisroot

 

the rootstock of several species of iris, which contains an essential oil with the fragrance of violet. Orrisroot is used as an aromatic agent. The oil of the species Iris germanica, I.florentina, and I. pallida is used commercially. The yield of oil constitutes 0.1–0.2 percent of the weight of raw rootstock. The oil is extracted from the rootstock with a weak solution of sulfuric acid, which is then driven off with steam. The violet fragrance is due to the ketone irone, which constitutes approximately 12–15 percent of the oil.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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References in periodicals archive
To scent the mix, Ashworth places the orrisroot and scented oil in a gallon jar and swirls them around.
She lets the mix sit for two to three weeks, gently tilting the jar every day or so to distribute the orrisroot evenly.
Everlasting flowers
Place the pomander in a bowl containing a spice mixture made of 2 tablespoons each ground cloves, ground cinnamon, ground allspice, and ground nutmeg, and 1/2 teaspoon each ground ginger and orrisroot. Turn the pomander to coat evenly, then turn it daily for a week.
Admire-and-sniff ornaments, wreaths, mini-tree
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