O*pop"a*nax (?), n. [L., fr. Gr. ; vegetable juice + , . a kind of plant: cf. F. opopanax.]
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.
© Webster 1913.