Opopanax

from The Century Dictionary.

• 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.
• noun In the southern United States, the huisache, Acacia Farnesiana. In this sense sometimes with the French spelling opoponax. See huisache.

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