hy·dras·tis noun \hī-ˈdras-təs\
capitalized : a genus of herbs (family Ranunculaceae) having palmately lobed leaves and small greenish flowers and including the goldenseal (H. canadensis)
: the dried rhizome and roots of the goldenseal formerly used in pharmacy as a bitter tonic, hemostatic, and antiseptic—called also goldenseal
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