Opopanax

from The Century Dictionary.

• noun In the southern United States, the huisache, Acacia Farnesiana. In this sense sometimes with the French spelling opoponax. See huisache.
• noun A gum-resin consisting of a concreted juice obtained from the roots of a plant of the genus Opopanax (see def. 2).
• noun [capitalized] [NL. (Koch, 1825).] A genus of umbelliferous plants of the tribe Peucedaneæ, characterized by fruit with many oil-tubes and thickened margins, and by the absence of calyxteeth.

from the GNU version of the Collaborative International Dictionary of English.

• noun The inspissated juice of an umbelliferous plant (the Opoponax Chironum), brought from Turkey and the East Indies in loose granules, or sometimes in larger masses, of a reddish yellow color, with specks of white. It has a strong smell and acrid taste, and was formerly used in medicine as an emmenagogue and antispasmodic.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun an odorous gum resin formerly used in medicines