- a plant, Hydrastis canadensis, of the buttercup family, having a thick yellow rootstock.
- the rhizomes and roots of this plant, formerly used in medicine as an astringent and to inhibit bleeding.
- a ranunculaceous woodland plant, Hydrastis canadensis, of E North America, whose thick yellow rootstock contains such alkaloids as berberine and hydrastine and was formerly used medicinally
