Wiktionary
n. (context organic compound English) The methyl ether of chavicol; it occurs in the essential oil of tarragon
Wikipedia
Estragole (p-allylanisole, methyl chavicol) is a phenylpropene, a natural organic compound. Its chemical structure consists of a benzene ring substituted with a methoxy group and a propenyl group. It is an isomer of anethole, differing with respect to the location of the double bond. It is a colorless liquid, although impure samples can appear yellow. It is a component of various trees and plants, including turpentine (pine oil), anise, fennel, bay, tarragon, and basil. It is used in the preparation of fragrances.
Usage examples of "estragole".
Safrole, a compound related to estragole, is the reason natural root beer is now banned by the FDA.
The fennel contained trace amounts of estragole, a mild hallucinogenic.